Please help for test

A doctor claims that the population gets, on average, more than 8 hours of sleep. A study was conducted on a sample of 25 individuals, and observed that the mean hours of sleep was 8.2, with a standard deviation of 0.3. Answer the following questions to test the doctor's claim using an a = 0.01 level of significance. Round all final answers to 3 decimal places where appropriate. (a) State the null and alternative hypotheses, and identify which one is the claim. Which one is the claim: 0 HO 0 Ha (b) What is the critical t-value(s)? :] (c) What is the test static? :] (d) Is the null hypothesis rejected? 0 Yes 0 No (e) Is the claim supported? 0 No 0 Yes