3. Problem 8.31 In a survey of 823 human resource professionals concerning challenges they faced in the workplace, 329 said the employee retention/turnover was an important challenge and 181 said that employee satisfaction was an important consideration. a. Construct a 95% confidence interval estimate of the population proportion of human resource professionals who believe that employee retention/turnover was an important challenge. b. Construct a 95% confidence interval estimate of the population proportion of human resource professionals who believe that employee satisfaction was an important challenge. c. How would a human resource professional use the results of a) and b)