In the second oart interest is compounded

Question 4. a) The two cash flow transactions shown in the accompanying cash flow diagram are said to be equivalent at 9% interest compounded annually. Find the unknown value of X that satisfies the equivalence. $280 $280 $210 $210 $140 $140 Years X X X X 0 1 2 4 3 Years b) Consider the following sequence of deposits and withdrawals over a period of four years. If you earn 10% interest on your deposits, how much will you able to withdraw at the end of four years? $2,850 $3,500 $2,000 $2,000