The following three defense stocks are to be combined into a stock index in January 2019 (perhaps a portfolio manager believes these stocks are an appropriate benchmark for his or her performance); Douglas McDonnell Dynamics General International Rockwell Sharee millione) 1/1/19 355 586 455 55 270 04 Peace 1/1/20 $.91 32 73 1/1/21 $103 66 87 a. Calculate the initial value of the Index If a price-welghting scheme is used. Index Value b. What is the rate of return on this Index for the year ending December 31, 2019? For the year ending December 31, 20207 (A negative value should be indicated by a minus sign. Do not round Intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.) 2019 retum 2020 return %