Find the critical value (or values) for the t test for each.
a. n = 10, α = 0.05, right-tailed
b. n = 18, α = 0.10, two-tailed
c. n = 6, α = 0.01, left-tailed
d. n = 9, α = 0.025, right-tailed
e. n = 15, α = 0.05, two-tailed
f. n = 23, α = 0.005, left-tailed
g. n = 28, α = 0.01, two-tailed
h. n = 17, α = 0.02, two-tailed