Question 7 (1 point) Suppose we want to test H0: u = 80 against Ha: p. at 80, based on a random sample of 50, a standard deviation of 16, and a sample mean of 78. Check all of the correct decisions: C] a) not reject H0 at Cl 0.10. C] b) reject H0 at or 0.10. C] c) not reject H0 at or 0.07. C] d) reject H0 at or 0.07. C] e) not reject H0 at or 0.05. C] f) reject H0 at or 0.05