how do you do longhand

Use the t-distribution table to find the critical value(s) for the indicated alternative hypotheses, level of significance a, and sample sizes n, and n, . Assume that th samples are independent, normal, and random. Answer parts (a) and (b). Ha- My # H2, a = 0.01, n, = 12, n2 = 10 (a) Find the critical value(s) assuming that the population variances are equal. (Type an integer or decimal rounded to three decimal places as needed. Use a comma to separate answers as needed.)