Consider the project of developing an optical simulator which has 6 different tasks. The tasks and task times are provided below in the following table:

Activity	Time	Immediate Predecessor
A. Optical Design	3	-
B. System Performance Analysis	2	A
C. System Integration	5	A
D. Cost Analysis	2	B, C
E. Production Management	6	D
F. Long Lead Item Procurement	12	D

Using the information provided in the table, draw a network diagram using Arrow Diagramming Method (ADM).