the suarez family invests $10,000 at an annual interest rate of 4.9% compounded monthly. how much is in the account after 3 years

Alejandro deposits $80 of his monthly earnings into an annuity that earns 6.25% annual interest, compounded monthly. How much money will he have saved after 5 years?

New grandparents decide to invest 3200 per month in an annuity for their grandson, The account will pay interest per year which is compounded monthly. How much will be in the child's account at his twenty-first birthday?