Michael invested $1,250 at the end of every month into an investment fund that was earning interest at 3.50% compounded monthly. He stopped making regular deposits at the end of 8 years when the interest rate changed to 3.75% compounded quarterly. However, he let the money grow in this investment fund for the next 2 years. a. Calculate the accumulated balance in his investment fund at the end of 8 years. b. Calculate the accumulated balance in his investment fund at the end of 10 years. Round to the nearest cent c. Calculate the amount of interest earned over the 10-year period