(Compound interest) To what amount will the following investments accumulate? a. $4,800 invested for 9 years at 9 percent compounded annually b. 58.200 invested for 6 years at 9 percent compounded annually c. $800 invested for 11 years at 11 percent compounded annually d. 521,000 invested for 6 years at 5 percent compounded annually a. 10 wnar amount will $4,000 investea lor y years at y percent compounded annually accumulate $ (Round to the nearest cent.) b. To what amount will $8,200 invested for 6 years at 9 percent compounded annually accumulate? $ (Round to the nearest cent.) c. To what amount will $800 invested for 11 years at 11 percent compounded annually accumulate? 5 (Round to the nearest cent) d. To what amount will $21.000 invested for 6 years at 5 percent compounded annually accumulate? $ (Round to the nearest cent)