Num 2 i need step by step for really details using remainder fuction plz

2. Riya has deposited $200 every three months into an investment account that averaged 8.2%, compounded quarterly, beginning when she had her 21st birthday. a. How much will Riya have saved for her retirement when she is 55 years of age? [2 - K] b. At 55 years old, Riya will no longer deposit into the account and just allow the money to earn the same rate of interest for 10 years. How much will she have accumulated in that time? [2-A] C. At 65 years old, Riya will transfer the money from her investment account into a retirement account at an interest rate of 5.8%, compounded monthly. How long will this investment last if she wants a monthly income of $3000? [4-T] 3. Chris invests $500 at 7200