plant engineering group is responsible for setting up the assembly line to manufacture a new product. The production processes have already been designed by the process-engineering group, and the machinery has been delivered to the plant from vendors. Because the facility has been redesigned to contain the assembly line and because the machinery is already on-site, the assembly line must be ready for a dry run in one month. The plant engineering group has identified these activities, determined their precedence relationships, and estimated their durations:

ACTIVITY* A,B,C,D,E,F,G,H,I,J,K

ACTIVITY DURATION: 3,5,7,4,3,9,5,6,3,5,4

IMEDIATE PREDECESSOR ACTIVITY: - ,-, B ,B ,AC ,D, EF ,D, EF, GH ,IJ

a) Construct a critical path network (CPM) for the project.

b) Compute the earliest finish (EF), latest finish (LF), and slack (S) for each activity. Write the values on the CPM network.

c) What is the critical path?