stuck on this set

Practice displaying the following; Claim statement, complement statement, Ho(null hypothesis) statement, Ha(alternative statement), P value The credit manager of a department store suspects that the population mean H age of the store's customers is less than 40 years. She wants to test the hypothesis that the population mean age is less than 40 at the 5% significance level. The sample data of 8 customers is 36, 44, 28, 33, 37, 38. 38, and 44. (MEAN - ONE SAMPLE)