EXERCISE 4.13. In this exercise, you are to make the result of Theorem 2.17 effective. Suppose that we are given a positive integer n, two elements , E and integers 1 and m, such that -pn and gcd(1, m) = I. Show how to compute YE Z, such that = r", in time 0(len(1) len(m) + (len(1) + len(m)) len(n)2). EXERCISE 4.13. In this exercise, you are to make the result of Theorem 2.17 effective. Suppose that we are given a positive integer n, two elements , E and integers 1 and m, such that -pn and gcd(1, m) = I. Show how to compute YE Z, such that = r", in time 0(len(1) len(m) + (len(1) + len(m)) len(n)2)