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The arithmetic average return for a stock with a three-year performance history of +50%, +74%. -100% is: 8%. -10096. 2496. O 0%. The geometric mean return for a stock with a three-year performance history of +50%6, +74%, 100% is: 0 0% 0 -100% 0896 24%. Based on the return statistics, below, and assuming the T-bill rate is anywhere near its historical annual average, which portfolio should have the highest Sharpe ratio (S)? Data (in decimal form Portfolios 1 2 3 4 Expected Return Ec) 112 .15 Standard Deviation (6) .30 21 .16 .50 21 24 O 2 03 0 1