I need help with his homework question:The decision rule is to reject the null hypothesis if the P value

Questions 17, 18, 19, 20 and 21 will all use this information A cable company claims that customers will wait in le is 20 minutes on average. A consumer advocate believes the average wait has increased. 22 customers are sampled. Sample statistics for these 22 customers are: X =26 s=12 Can the consumer advocate support the claim that the mean wait in line is over 20 minutes? Test using a significance level of 1%