Dorchester Manufacturers has developed a new style of table that will be made on an assembly line. The schedule requires 240 tables in two nine-hour shifts per day. The assembly includes seven tasks. The table below indicates the performance time and the sequence requirements for each task. Task Performance Time (minutes) Predecessor A 4.2 B 2.7 C 3.5 A D 1.6 B E 4.0 C, D F 2.2 D, E G 3.2 F