In her passionate and disparaging letter to the editor, Nicole Barnett castigates the government’s decision to send asylum seekers requiring medical treatment in Australia back to Nauru. Barnett’s appeal to patriotism throughout the letter in associating the government’s proposition with ‘un-Australian’ awesome job at actually clarifying what the appeal to patriotism is rather than just being like 'there's an appeal to patriotism' and leaving it at that values instils doubt in the reader towards the ethics of returning these refugees to Nauru. Barnett’s analogy of surf lifesavers portrays reeeeally minor point, but the word 'portrays' only really works in the context of an active agent or person portraying something. So you can say 'The author portrays his life story,' but you can say 'His life story portrays hardships' if that makes sense. A person portrays things; things can't portray other things
In this context, you could say 'Barnett portrays...' but not 'Barnett's analogy portrays...' the ‘quintessential Australian’ as people who risk themselves to save others regardless of their circumstances, in stark contrast to the government’s action against the refugees. This analogy interprets again, verb choice doesn't quite work since an analogy can't interpret things. It can convey something, or express something, so try to use more active verbs the return of refugees to Nauru as ridiculous and unreasonable, which promotes audience support of Barnett’s position in condemnation of the government’s proposition v. good! Furthermore, Barnett’s inclusive language in discussing ‘our’ lifesavers transfers responsibility to the reader and compels the audience to act upon the Australian values of fairness and compassion in opposing the government’s return of asylum seekers to Nauru. Finally, Barnett’s indignant tone this is a little bit list-y since your transitions are just like 'Furthermore, the author's >technique< in doing X leads to Y' so mixing up your sentence structure would be ideal just to prevent that sense of repetition gives way to one of authority when she calls for the government to act upon the alternatives presented by ‘academics, “think tanks” and lawyers’. By presenting her alternative solution as one supported by intelligent and accomplished professionals, Barnett strengthens audience approval of her seemingly fairer, more reasonable and more favourable proposition than that of the government, convincing the reader to reject the government’s actions. Really good discussion of the effect; you've got a great understanding of the author's intent both in terms of the argument and how he wants the readers to respond.
You've got the process of analysis under control, so you're probably at the stage now where you can start being a bit more confident in varying your sentence structure. You don't have to start with the effect and backtrack to the language or anything weird like that, but even something as small as altering the way you introduce a point can stop the assessors from acknowledging the pattern/formula you're using
eg. 'The author's use of X as seen in "Y" engenders readers' sense of Z'
--> The X evident in "Y" forms part of the author's attempts to engender Z
--> The author's declaration that "Y" is an example of X, which contributes to readers' sense of Z
--> X is also employed by the author in the phrase "Y" in order to engender a sense of Z
...and so on
Devising your own variants of the above should help you incorporate alternations in your analysis.
The other thing to look out for is your verb usage - words like 'portrays' and 'interprets' have limited applicability in Language Analysis and you'd probably be better off using the kinds of words
here under the first two tabs in particular.
Let me know if that vocab explanation didn't make sense

Other than that, you definitely seem to be on top of the whole 'showing your workings' stuff and you're providing a good amount of explanation. Because this is a small scale task, it's a little tough to judge things like concise-ness, though perhaps you could afford to cut down on some of the more similar effect statements.
eg. instead of saying:
the technique A which elicits feelings of B forms part of the author's attempt to C
+ also the technique D elicits feelings of E, also contributing to the author's attempt to Cyou could just say:
the technique A elicits feelings of B
+ the author also uses technique D which elicits feelings of E
--> this further strengthens the author's attempt to C
If the overall effect/intention is the same, then you can group them to prevent having to restate points or repeat yourself.
Well done 
Barnett voices her thoughts on the Australian Government's recent announcement concerning the fate of asylum seekers seeking medical aid in Australia in an appalled, disgruntled tone, mainly focusing on the lack of Australian Spirit no capitalisation needed here the government is displaying. Little bit verbose; you could just say 'Barnett employs an appalled, disgruntled tone to condemn the lack of Australian spirit shown by the govt. to asylum seekers.' What you've got here at the moment is like 'The author talks about X in a tone that is Y, focusing on argument Z' but that initial 'talks about X' is a bit unnecessary. We're more interested in the author's argument than the subject matter of their argument, if that helps. But this might've just been an issue because it's a short, introduction-less piece, in which case it's totally fine
She first unless the chronology is important, don't draw attention to it. The fact that she does this "first" isn't something you unpack or analyse as being persuasive, so it's basically a wasted word in this context laments their denial of ‘care and protection’ to the asylum seekers- a basic human right- and their disregard of the advice of ‘medical professionals’, thus portraying the government as morally corrupt and invalidated in their decisions phrasing is a bit clunky, but analysis is solid. Not only does this lead the audience to lose trust in them, but also evokes emotions of outrage and disapproval towards them, degrading their credibility and urging readers to agree with the author’s contention what part of their contention?? Never say this unless you're instantly going to be more specific like 'to agree with the author's contention THAT THE ASYLUM SEEKERS DESERVE BETTER TREATMENT' in face of these atrocities. This is further extrapolated upon in Barnett’s following statements as she juxtaposes the unjust actions of the government to ‘our surf lifesavers’, revealing the vast dichotomy between their merits and lack thereof I know what you're suggesting here, but grammatically, it's unclear who has merits and who lacks them. Not only does the use of the inclusive pronoun ‘our’ allow the author to connect with the audience further by associating with them together as a nation, but it also purposely excludes the government from this group, following do you mean 'because of'? Just a little unclear on the meaning here their ‘un-Australian’ nature. This appeals to the patriotism of the audience, and encourages them to criticize the government as they are not living up to their responsibilities as an Australian Australians (since you're talking about 'the government' which is an intrinsically plural noun in this context - you say '...criticise the government as they...' not 'the government as he/she/it'). As a result, readers are drawn to look down upon vocab the government and instead support the author’s contention, in accordance with their sense of patriotism. slight repetition of 'patriotism' here but otherwise okay.
Excellent discussion of how the elements of this piece combined to have cumulative effects on readers. There were a few phrases here and there that could've been refined to maximise clarity or efficiency, so watch out for your grammar and word choices.
(+see link above to Heidi's awesome vocab post!)
Also, make sure you're providing the right amount of information - or, more accurately, that you're hitting that balance between specificity and generalisations in the right place.
Your first sentence contains a little too much info to the point where a bit of it is kind of redundant. But that sentence where you say 'urges readers to agree with the author's contention' needs MORE!
Aside from that, you're definitely on the right track, and you've got a really solid foundation for your interpretation, so keep it up!
