You find a certain stock that had returns of 16 percent, 9 percent, 23 percent, and 24 percent for four of the last five years. The average return of the stock over this period was 14.4 percent.

Required:

a) What was the stocks return for the missing year? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

b) What is the standard deviation of the stocks returns? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)