Scheduling Classes Using an Organized List

Anthony is selecting his courses for next semester. Because he works afternoons and also commutes, he must schedule classes that meet only on Monday, Wednesday, and Friday mornings and has decided on the following possibilities: Math at 9, 11, or 12; English at 9 or 12; Sociology at 10, 11, or 12; Art History at 9, 10, or 11. Determine the possible ways that Anthony can schedule these classes.