Exercise 9.1. Use Blankinship's method to compute the s and t in Bezout's Lemma for each of the following values of a and b. a = 267, b = 112 (1) a = (2) a 216, b= 135 = (3) a = 11312, b 11321 = Exercise 9.2. Show that if 1 = as+bt then ged(a, b) = 1. Exercise 9.3. Find integers a, b, d, s, t such that all of the following hold (1) a > 0, b> 0, (2) d sa+tb, and (3) d = gcd(a, b). Note that d in Exercise 9.3 cannot be 1 by Exercise 9.2.