15. The following prices on two stocks were observed over the last five years. Time Stock A Stock B Om tin 1 2 3 4 5 $11 12 10 13 15 16 $18 15 16 14 13 18 Stock A paid no dividend during the five years. Stock B paid a dividend of $1 per share per year in the first three years and $1.15 per share per year in the last two years. Calculate the following: (a) The rate of return for each stock for each of the five years (b) The arithmetic mean for both stocks (c) The geometric mean for both stocks