Find the critical value and rejection region for the type of t-test with level of significance and sample size n.

Left-tailed test, = 0.1, n = 22

a. t₀= 1.323; t > 1.323

b. t₀= -1.323; t < -1.323

c. t₀= -1.321; t < -1.321

d. t₀= -2.518; t < -2.518