Please solve for A & B and show work

A If Alvin invests $5,500 today in a savings account, the money will grow to $8.500 at the end of Year 4. Assuming that the interest is paid once per year, the effective annual rate of the investment is B. LeGo Financials offer two investment plans. Investment A pays 9 percent interest compounded monthly, whereas Investment B pays 10 percent interest compounded semiannually. What are the effective annual rates of Investment A and Investment B