Question 5 - A-Level Maths

Activity	Immediately preceding activities
A	-
B	-
C	-
D	A
E	C
F	A, B, C
G	A, B, C
H	D, F, G
I	A, B, C
J	D, F, G
K	H
L	D, E, F, G, I

Draw the activity network described in the precedence table above, using activity on arc. Your activity network must contain only the minimum number of dummies. Given that all critical paths for the network include activity H ,
state which activities cannot be critical.
(2)