Upon graduating from college 30 years ago, Dr. Nick Riviera was already thinking of retirement. Since then he has made deposits into his retirement fund on a semiannual basis in the amount of 800. Nick has just completed his final payment and is at last ready to retire. His retirement fund has earned 6.5% interest compounded semiannually. a. How much has Nick accumulated in his retirement account? b. In addition to all this, 20 years ago, Nick received an inheritance check for $30,000 from his beloved uncle. He decided to deposit the entire amount into his retirement fund. What is his current balance in the fund?