Diagonalization 4. For each countable set of infinite sequences, use diagonalization (2.4.5) to construct an infinite sequence of the same type that is not in the set a. {(fn(0), fn(1), , fn(n), . . . )lfn(k) (hello, world) for nkE N} b. ((n, 0),(,1), f(n, n), ...lf(n, k) a, b, c for n k E N). c. ano, ani, ..., ann, ...Hank E 2, 4, 6, 8) for n,kEN