Need help with BOTH questions 1 and 2

1. A stock had returns of 6 percent, 0 percent, -13 percent, 11 percent, -9 percent, and 14 percent over the past six years. a. What is the geometric average return of this stock for this time period? b. What is the arithmetic average return for this time period? c. What is the standard deviation of this stock for this time period? 2. A stock has an expected return of 8.98%, its beta is 0.84, and the expected return on the market is 10.2%. What is the risk-free rate