Find the t value that forms the boundary of the critical region in the right-hand tail for a two-tailed test with α  = .05 for each of the following sample sizes.

a. n = 9

b. n = 16

c. n = 36  

d. Repeat parts a–c assuming a one-tailed test, α = .05.

e. Repeat parts a–c assuming a two-tailed test, α = .01.