4. Your retirement goal is to have $3,000,000 available (in the bank) when you retire at age 67 . Suppose your contribution into that plan consisted entirely of equal annual payments, commencing at age 51 and ending at age 67 . What is the size of the contribution needed to achieve your goal? Assume a 6% annual interest rate. a. $106,334.41 b. $105,334.41 c. $96,554.61 d. $95,554.61