help with both questions please

28, Ah investment offers to triple your money in 36 months ( an offer not likely to be true). What interest rate per three months is being offered? A) 38.35% B) 27.97% C) 16.28% D) 12.47% E) 9.58% . 29. Your parents agree to pay half of the purchase price of a new car when you graduate college. You will graduate and buy the car two years from now. You have $6,000 to invest today and can earn 10% on invested funds. If your parents match the amount of money you have in two years, what is the maximum you can spend on the new car? A) $ 7,260 B) $11,948 C) $12,000 D) $13,250 E) $14,520