I'm confused on a few of these questions and would appreciate any help, thank you

The mean wait time at a particular DMV (department of motor vehicles) is 40 minutes. For 45 randomly selected days over three months, a new procedure is implemented to determine whether wait times are lower on average on days when the new procedure is being used. The mean and standard deviation for the 45 days is 39.7 min and 13 min, respectively. Test the appropriate hypotheses using a = 0.05. Set up the null and alternative hypothesis. 0 H0: ,u = 40 vs.Ha: y 9vs.Ha:,u9 J Compute the test statistic for this situation. (Round your answer to two decimal places.) 1\" = Calculate the pvalue for the test. (Use technology to calculate the p-value using the unrounded t value. Round your answer to four decimal places.) p-value =