Find the interest rate implied by the following combinations of present and future values: (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places. Leave no cells blank - be certain to enter "0" wherever required.)

Present value: $350 years: 11 future value: 539 Interest rate ?%

Present value: $158 years: 4 future value: 207 Interest rate ?%

Present value: $250 years: 7 future value: 150 Interest rate ?%

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