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The returns for a stock are listed below in the table. What is the arithmetic average return for this stock over this time period? Periods R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 Returns -0.93% 14.16% 14.72% -11.28% 0% 4.32% 2.69% 5.64% -19.85% -14.2% 3.59% 13.26% Answer should be formatted as a percent with 2 decimal places (e.g. 99.99).