need help with C.D, and E

(Solving a comprehensive problem) Use the end-of-year stock price data in the popup window, , to answer the following questions for the Harris and Pinwheel companies. a. Compute the annual rates of return for each time period and for both firms. c. Compute a three-year rate of return spanning the entire period (i.e., using the ending price for period 1 and ending price for period 4 ). d. Since the rate of return calculated in part c is a three-year rate of return, convert it to an annual rate of return by using the following equation: average rate of return (arithmetic or geometric) should you use? Why? a. Enter the annual rate of return for each year for Harris in the table below. (Round to two decimal places.) b. The arithmetic average rate of return earned by investing in Harris stock over this period is o. (Round to two decimal places.) The arithmetic average rate of return earned by investing in Pinwheel stock over this period is \%. (Round to two decimal places.) The geometric average rate of return earned by investing in Harris stock over this period is \%. (Round to two decimal places.) The geometric average rate of return earned by investing in Pinwheel stock over this period is 6. (Round to two decimal places.)