Help needed please quickly answers hand written please

Name : Exercice 9. A runner's present diet results in, on average, 42 minutes per run (say, of 10 kilometers). An alternate diet has been suggested by a specialist, who claims that it will increase his performance. Suppose that the new diet was tried on 10 occasions with the following times resulting : 43, 38.5, 37.5, 40, 38.2, 36, 42, 36.5, 36, 34. Do these data establish the claim that the new diet is better, at the (a) 1 percent (b) 5 percent (c) 10 percent level of significance