Intro A stock delivered the following annual returns over the last 4 years: Year 1 2 3 4 Return 6% 3% -8% 3% Part 1 IB"Attempt 2/5 for 4.9 pts. What was the arithmetic average return over the 4 years? 0.01 Correct Ra R1 + R2 + R3 + R4 4 0.06 + 0.03 + - 0.08 + 0.03 4 0.01 Part 2 Attempt 2/5 for 4.8 pts. What is the standard deviation of the stock's return based on the historical data? 0.04272 Try again Try again See solution (-1 pts.)