Determine whether each of these functions from {a, b, c, d} to itself is one-to-one. a) f

a) = b, f (b) = a, f © = c, f (d) = d

b) f (a) = b, f (b) = b, f © = d, f (d) = c

c) f (a) = d, f (b) = b, f © = c, f (d) = d

Determine whether each of these functions from {a, b, c, d} to itself is one-to-one. a) f

a) = b, f (b) = a, f © = c, f (d) = d

b) f (a) = b, f (b) = b, f © = d, f (d) = c

c) f (a) = d, f (b) = b, f © = c, f (d) = d