please work out 1.2 with all workings

QUESTION ONE [20] 1.1 Sassy Spice has R100 000 that she can deposit in any three fixed deposit savings accounts, each at different banks. She will withdraw her funds in 4 years, time, on her return from studying overseas, to pay for a deposit on her first house. Sassy has been quoted the following annual interest rates by the three banks: Bank A 12% per annum, compounded annually Bank B: 11.8% per annum, compounded annually Bank C: 11.4% per annum, compounded annually Required: Calculate which bank Sassy Spice should leave her money with for the 4-year period. (10) 1.2 Rocky Rockett expects to retire in 40 years time and has decided to start investing for his retirement. He is looking at two possible retirement funds, both of which mature in 40 years, time and which offer a return of 11% per annum, compounded annually. Retirement Fund A requires annual instalments of R2 500 at the beginning of each year commencing immediately. These instalments will continue for 25 years. Thereafter the investment will continue to earn the quoted return until the policy matures. Retirement Fund B requires annual instalments of R2 200 at the end of each year with the first instalment being made in one year's time. These instalments will continue each year up until the policy's maturity date. Required: Calculate which retirement policy will have the greatest maturity value