1. Ten tasks with precedence and times have been identified to complete 60 units of Super RC Offroad Car in 8 hours. The summary of the information are as follows:

Task	Precedence	Time (min)	Task	Precedence	Time (min)
A	-	4	F	D,E	6
B	A	3	G	F	4
C	-	6	H	F,G	3
D	A,C	7	I	H	8
E	B,D	8	J	I	4

1. Draw the relationship diagram.

(5 marks)

1. Determine the minimum number of workstations.

(3 marks)

1. Assign all the tasks into workstations.

(4 marks)

1. Calculate the efficiency of the line.

(2 marks)