Demand for a process is 10 per hour. Determine how to group the tasks below to satisfy the demand without having more excessive capacity than necessary. Give priority to tasks with the longest processing time first. Your answer should look like: AB, CD, E, FG

Task	Time (minutes)	Preceding Tasks
A	2	--
B	4.2	A
C	3.5	A
D	6	B
E	2.2	B
F	1.5	D
G	2.1	C,E,F