1. Construct a PERT/CPM network diagram for a project having the following activities;

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Activities Lead Duration/ Cost

Activities Weeks

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A - 4 20,000

B - 2 10,000

C - 3 15,000

D A 2 12000

E B 2 16,000

F C 3 21,000

G D,E 2 20,000

H F 3 30,000

I D,E 2 7,000

J I, H 2 12,000

K G 2 10,000

L K,J 3 9,000

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a. Compare the weekly costs using Earlier Start (ES) Earlier Finish (EF), with Last Start (LS) Last Finish (LF).