Determine if each of the following functions from {a,b,c,d} to itself is one-to-one and/or onto. Check ALL correct answers. (a) f(a) = b, f(b) = a, f(c) = c, f(d) = d A. neither one-to-one nor onto. B. one-to-one. C. onto. f(a) = b, f(b) = a, f(c) = b, f(d) = 0 A. one-to-one. B. onto. C. neither one-to-one nor onto. f(a) = b, f(0) = b, f(c) = d, f(d) = c A. neither one-to-one nor onto. B. one-to-one. C. onto.