Too many value judgements like EZ said (assesors hate this to bits), i think 6/10 would be generous, even if u finished the essay, coz they get most of ur mark from the first two or three paras.
You lack a model intro, which makes it seem week. If you have a structure to intro, you can use the same thing over and over again, its not even hard.
I do something like:
-Open up the first sentence with context.
-Then go straight into tone and contention, so the author contends in a bla bla bla tone that bla bla bla is bla bla bla bla.
That's basically all you need in the intro, you can add some other stuff like target audience at the end and stuff. I might be missing out on some stuff, coz i haven't dont language analysis in ages.
they get most of the meaty marks from ur analysis, but its important to have an intro that says something.
And like EZ said, more how the audience feels, also try to slip in a nice target audiences every now and then (not all the time), rather than calling htem audience all the time. But thats not terribly important. Most important is the how audience feels stuff, and authorial intention.
A minor thing, you said something about a "flurry of rhetorical questions", make sure their all rhetorical, some aren't some are. And if it's a flurry of questions, then you can use repetition as a technique, which aims to hammer a point in, leaving the audience with no room to argue, or watevs. oh and don't use flurry, it reminds me of lots of doves.
A biggish thing, you didn't really analyse the image at all. Get out ur using language to persuade book, and look up image techniques, e.g. framing, colour, background, foreground, angles, symbolism etc. and wat the impact of the visual elements are, and why the author used it. All you did was describe the picture and combined it with a quote....You can use the quote later after uve analysed the image, so like this quote reinforces the message of the image blargh blargh lol
Anyway, you got some time to improve, and i think the best way to learn is to just read sample essays and get a feel of wat it takes to do well....try asking fuzzy, if ur friends with her