Based on daily stock prices the rates of return per share for Sprite and Dr. Pepper are normally distributed. The mean and standard deviation for Sprite's rate of return are 2.5% and 1%. The mean and standard deviation for Dr. Pepper rate of return are -4.5% and 2%. Assume the rates of return per share are statistically independent.

There is a 0.2 probability that the rate of return for Sprite will be greater than what value?

Determine the probability the rate of return for Dr. Pepper will be positive.

Determine the probability that the rates of return for both stocks