27 Consider the precedence relations given in Table 21.

a. Draw an early-start Gantt chart.

b. Draw the AON network for this project.

c. Draw the AOA network.

d. Generate all possible paths for the AOA network, calculate their duration, and analyze the findings.

e. Calculate ES, EF, LF, and LS for each activity.

f. Calculate the slacks for the activities.

TABLE 21 Immediate Activity predecessors Weeks A – 1 B A 4 C A 3 D A 7 E B 6 F C,D 2 G E, F 7 H D 9 I G,H 4