In a experiment on relaxation techniques, subject's brain signals were measured before and after the relaxation exercises with the following results: Person 1 2 3 4 5 Before 31 36 65 49 32 After 26 36 57 51 23 Is there sufficient evidence to suggest that the relaxation exercise slowed the brain waves? (Use a=0.05) a) O Reject the null hypothesis which states there is no change in brain waves in favor of the alternate which states the brain waves slowed after relaxation. b) O Fail to reject the null hypothesis which states there is no change in brain waves. c) O There is not enough information to make a conclusion