You own a stock that had returns of 10.96 percent, -15.62 percent, 20.08 percent, and 18.82 percent over the past four years. What was the arithmetic average return for this stock? o 8.56% o 8.03% o 9.27% o 8.90% Multiple Choice 8.56% 8.03% 9.27% 8.90% 7.51%