Chris Seals has just given an insurance company $61,525. In return, she will receive an annuity of $6,951 for 16 years. a. At what rate of return must the insurance company invest this $61,525 to make the annual payments? (Use a Financial calculator to arrive at the answers. Round the final answer to 3 decimal places.) Rate of return % b. What rate of return is required if the annuity is payable at the beginning of each year? (Use a Financial calculator to arrive at the answers. Round the final answer to 2 decimal places.) Rate of return %