I am currently as we speak starting a quote of questions from 15D.. any questions from 14A-15C i can help.
So, I see you are aiming for a high study score for further maths similar to what I want to achieve. Therefore, I'm assuming you know that every question is extremely important in the exam because losing ~6 marks can drop down your ss below 45. Hence, where i'm trying to go with this is whether or not it is 'dangerous' to do networks for the exam because of its ambiguity and the fact that it is based more on logical reasoning than maths; you generally do not know if your answer is absolutely correct. Therefore, are you planning to do another model for the exam to replace networks? That is what i'm most likely planning to do after I finished my networks sac. I want to see what you have to say, or anybody else, regarding this.