3. The network below represents a project being analyzed by the critical path method. Activity durations are: A=5,B=2,C=12,D=3,E=5,F=1,G=7,H=2,I=10,andJ=6. a. What task must be on the critical path, regardless of activity durations? b. What is the duration of path A-B-E-H-J? c. What is the critical path of this network? d. What is the length of the critical path? e. What is slack time at activity H ? f. What is the Late Finish of activity H ? g. If activity C were delayed by two time units, what would happen to the project duration