An assembly line is to operate eight hours per day with a desired output of 240 units per day. The	following table contains information on this product's task times and precedence relationships:
Task	 Task Time (Seconds)	 Immediate Predecessor
A	 60	 --
B	 80	 A
C	 20	 A
D	 50	 A
E	 90	 B. C
F	 30	 C, D
G	 30	 E, F
H	 60	 G
a. Draw the precedence diagram.
b. What is the workstation cycle time?
d. What is the efficiency of your line balance?