Using the table below, calculate the Sharpe ratio of a portfolio with 80% allocated to security A and 20% allocated to security C. Assume a 3% risk-free rate. Hint: your text also calls the Sharpe ratio the reward-to- variability ratio. Time A, % B, % C.% D.% Mkt, % 1 18.56 18.23 12.82 12.43 14.48 2 15.27 18.24 -5.82 13.45 5.99 14.12 14.71 12.58 4.32 12.41 4 -1.57 -6.56 -7.43 -8.54 4.48 5 13.16 9.12 12.45 12.21 13.41 6 21.22 6.34 17.54 12.12 18.76 7 -3.45 -6.12 -4.62 -8.85 12.12 0.79 0.53 0.74 0.68