help me to explain the calculation

Assuming a Normal distribution, 95.44% of values will fall within a range of how many standard deviations? Select ane: B. 1 b. 2 . 3 d. 4 e. 6 You invest in a stock for 4 years and achieve the following rates of retum. What is the geometric aversge return over the 4 year period? a. 9.914 b. 9.17m