Andy, Bobby, and Cindy each went for a walk yesterday afternoon. Andy walked 2 3/4 at a constant speed of 2 1/2 mi/h. Beth walked 1 3/4 mi at a constant speed of 1 1/4 mi/h. Cathy walked for 1 h and 16 min at a constant speed of 1 1/4 mi/h. List the three people in order of the times they spent walking from least time to greatest time.
