2. (5 points) Use the t-tables and the 2-tables to find the critical value, ta/2 that corresponds to the significance and sample size n given in the following problems. {It may help to sketch the rejection region. Use the t-tables! Show your calculations!) a. a=0.01; n = 13 b. a=0.20; n = 32 C. Q=0.05; n = 19 d. a=0.02; n = 71 e. For this problem find the critical value Zarif a=0.0150