Please answer all questions. Provide separate answers for question a and b. Thanks in advance :)

4. To complete your last year in business school and then go through law school, you will need $10,000 per year for 4 years, starting next year (that is you will need to withdraw the first $10,000 one year from today). Your rich uncle offers to put you through school, and he will deposit in a bank paying 6% interest a sum of money that is sufficient to provide the 4 payments of S10,000 each. His deposit will be made today. a How large must the deposit be? b.How much will be in the account immediately after you make the first withdrawal? After the last withdrawal