Let S = {4, 6, 8} and T = {3, 5, 7}. Use the set roster notation to write each of the following sets, and indicate the number of
elements that are in each set. (Enter your answers as a comma-separated list of ordered pairs.) (a) S ✕ T S ✕ T = Number of elements in S ✕ T = (b) T ✕ S T ✕ S = Number of elements in T ✕ S = (c) S ✕ S S ✕ S = Number of elements in S ✕ S = (d) T ✕ T T ✕ T = Number of elements in T ✕ T =