The following three defense stocks are to be combined into a stock index in January 2016 (perhaps a portfolio manager believes these stocks are an appropriate benchmark for his or her performance): Price Shares (millions) 185 450 270 1/1/16 $ 69 Douglas McDonnell Dynamics General International Rockwell 1/1/17 $ 72 40 65 1/1/18 $ 85 47 54 79 a. Compute the rate of return on an equally weighted index of the three defense stocks for the year ending December 31, 2016. (A negative value should be indicated by a minus sign. Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Index return b. If the index value is set to 100 on January 1, 2016, what will the index value be on January 1, 2017? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Index value c. What is the rate of return on the index for 2017? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Index return