Determine the upper-tail critical value to2 in each of the following circumstances. a. 1 - a =0.99, n = 53 d. 1 - a = 0.99, n = 22 b. 1 - a = 0.90, n =53 e. 1 - a = 0.95, n =61 c. 1 - a =0.99, n = 39 a. t= (Round to four decimal places as needed.) b. t= 1.674 (Round to four decimal places as needed.) c. t= (Round to four decimal places as needed.) d. t= (Round to four decimal places as needed.) e. t= (Round to four decimal places as needed.)