?(Complex annuity?) Upon graduating from college 40 years? ago, Dr. Nick Riviera was already thinking of retirement. Since then he has made deposits into his retirement fund on a weekly basis in the amount of ?$40 . Nick has just completed his final payment and is at last ready to retire. His retirement fund has earned 9.1 ?% interest compounded weekly.
a. Since graduating from college 40 years ago, Dr. Nick Riviera has made deposits into his retirement fund on a weekly basis in the amount of $40. If his retirement fund has earned 9.1 % interest compounded weekly, how much has Nick accumulated in his retirement account?
b. In addition to all? this, 20 years? ago, Nick received an inheritance check for ?$25,000 from his beloved uncle. He decided to deposit the entire amount into his retirement fund. What is his current balance in the? fund?