(a) Mark would like to retire at age 65 and live in retirement from age 6592 on a monthly retirement income of $10,987. If, from age age 6592, Marks money is invested in an account where interest is 5.5% compounded monthly, then how much money needs to be in the account when Mark retires at the age of 65 in order to make his retirement dreams come true?

(b) If Mark plans for retirement by making equal monthly investments from age 21-65 into an account where interest is 7% compounded monthly, then what must his monthly investments be in order to make his retirement dreams come true?

(c) How much will Mark withdraw from the account in total?

(d) How much will Mark personally invest in his account?