Suppose a traveler wanted to visit a museum, an art gallery, and the state capitol building. 45-minute tours are offered attraction hourly from 10 a.m. through 3 p.m. (6 different hours). Solve the problem, disregarding travel time. In how many ways could the traveler schedule all three tours in one day, with the museum tour being after noon? A) 40 B) 20 C) 60 D) 30