This is my solution to the last two parts of question 10, just in case anyone still cares (I am a bored accelerant at the moment). I hope this will clear up the errors with other solutions posted. Anyone with a graphing program is advised to make graphs of y and A against x, as this illustrates...
i'm such an idiot! i normally do really well, but i looked at 1 e) for like 10 mins going wtf before i realised what i had to do. i was quite happy that i got 6 and 7 out cos normally i can't do projectiles, but the friggin induction!!! i've done that question in the excel book, but couldn't do...