Please help me answer the following question part a and b

this is a business analytics course mos 2298

The historical returns on a balanced portfolio have had an average return of 7% and a standard deviation of 17%. Assume that returns on this portfolio follow a normal distribution. (You may find it useful to reference the z table.) a. What percentage of returns were greater than 41%? (Round your final answer to 2 decimal places.) Percentage of returns % b. What percentage of returns were below -44%? (Round your final answer to 2 decimal places.) Percentage of returns % The historical returns on a balanced portfolio have had an average return of 7% and a standard deviation of 17%. Assume that returns on this portfolio follow a normal distribution. (You may find it useful to reference the z table.) a. What percentage of returns were greater than 41%? (Round your final answer to 2 decimal places.) Percentage of returns % b. What percentage of returns were below -44%? (Round your final answer to 2 decimal places.) Percentage of returns %