How much money should he invest in the certificates to reach his goal?

1. How much is accumulated in each of these savings plans over two vears?
(a) Deposit 1000 yuan today at 10% compounded annually.
(b) Deposit 900 yuan today at 12% compounded monthly.
2. Greg wants to have $50 000 in five vears. The bank is offering five-year investment certificates that pay 8% nominal interest, compounded quarterly. How much money should he invest in the certificates to reach his goal?