I've widely searched the forums but I couldn't find if these questions were discussed anywhere:

PART I

Question 16) Could someone prove how only g is linear and not f?

Question 17) I couldn't properly solve this partial derivative. Could anyone show the steps?

Question 19) Logic behind the answer?

Question 2) Shouldn't the answer be A) i.e (0.01)(0.99)^9?

Question 5) What is the quickest of finding the function for 'y'?

Thanks in advance, guys and gals :)

http://economicsentrance.weebly.com/uploads/1/1/0/5/1105777/28_june_2008_option_a.pdfPS- Sorry couldn't post the questions, pdf format was not unlock-able.