Activity	Immediate predecessor activities	Activity duration(days)
A		7
B		10
C	A	14
D	B	12
E	B	19
F	A	21
G	C,D	14
H	F,G,E	8

a. Draw a CPM network for the project.

b. Computing the duration for each path also tabulate the (EF, LF, ES, LS) times.

c. What is the critical path? What is the project's estimated duration?