McCauley's Heating and Air in Kamloops, BC, sells Mystifiers to keep homes and businesses from getting too dry in the desert air. The precedence diagram and task times (in minutes) for assembling a Mystifier are shown here. Set up an assembly line to produce 125 mystifiers in a 40-hour week. Balance the line and calculate its efficiency.

8 5. A B F 4 9 D H7 K3 10 5. 2 2.