Answer to question 29(e) I used the present value formula and got 251056.96 with normal repayments.
Then added 250 x 12 x 20 = 60,000 dollars.
Then add them to together 60,000 + 251056.96 = 311056.96.
311056 - 300,000 = 11056 :)
So he could pay of the loan within 20 years :D