You are considering the risk-return profile of two mutual funds for investment. The relatively risky fund promises an expected return of 7.4% with a standard deviation of 13.5%. The relatively less risky fund promises an expected return and standard deviation of 3.8% and 7.7%, respectively. Assume that the returns are approximately normally distributed.

a. calculate the probability of earning a negative return for each fund. (Round "z" value to 2 decimal places and final answer to 4 decimal places.)

Riskier fund
Less risky fund

b. Calculate the probability of earning a return above 8.3% for each fund. (Round "z" value to 2 decimal places and final answer to 4 decimal places.)

Riskier fund
less risky fund