7.(5%) Suppose you purchase one share of the stock of Cereal Correlation Company at the beginning of year 1 for $50. At the end of year 1, you receive a $1 dividend and buy one more share for $72. At the end of year 2, you receive total dividends of $2 (i.e., $1 for each share) and sell the shares for $67.20 each. The dollar-weighted return (Internal rate of return) on your investment is: a) 10.00% b) 8.78% c) 19.71% d) 20.36%