Present value and future value computations. Part(a) Compute the amount that a $20,000 investment today would accumulate at 10% (compound interest) by the end of 6 years. Part (b) Tom wants to retire at the end of this year (2010). His life expectancy is 20 years from his retirement. Tom has come to you, his CPA, to learn how much he should deposit on December 31, 2010 to be able to withdraw $40,000 at the end of each year for the next 20 years, assuming the amount on deposit will earn 8% interest annually. Part (c) Judy Thomas has a $1,200 overdue debt for medical books and supplies at Joe's Bookstore. She has only $400 in her checking account and doesn't want her parents to know about this debt. Joe's tells her that she may settle the account in one of two ways since she can't pay it all now: 1. Pay $400 now and $1,000 when she completes her residency, two years from today. 2. Pay $1,600 one year after completion of residency, three years from today. Assuming that the cost of money is the only factor in Judy's decision and that the cost of money to her is 8%, which alternative should she choose? Your answer must be supported with calculations. Requirement: Use excel to analyze each option, Then Make your decision