Consider an investment with the returns over 4 years as shown here: a. What is the compound annual growth rate (CAGR) for this investment over the 4 years? b. What is the average annual return of the investment over the 4 years? c. Which is a better measure of the investment's past performance? If the investment's returns are independent and identically distributed, which is a better measure of the investment's expected return next year? a. What is the compound annual growth rate (CAGR) for this investment over the 4 years? The compound annual growth rate is %. (Round to two decimal places.) b. What is the average annual return of the investment over the 4 years? The average annual return is %. (Round to two decimal places.) c. Which is a better measure of the investment's past performance? If the investment's returns are independent and identically distributed, which is a better measure of the investment's expected return next year? (Select from the drop-down menus.) is a better measure of the investment's past performance while is a better measure of the investment's expected return next year. Year Return 1 12% 2 15% 3 7% 4 18%