cu. Basic concepts {vanes-J What is Gantt chart? ([2. Critical Path Method [WM] What are the three project management steps? What are the most important goals in each step? What is project organization? What is the project work break down structure? Here is the description of the project Activity A: Prototype design B: Purchase of materials C: Manufacture of prototypes D: Revision of design E: initial production run F: Stafftraining G: Staff input on prototype Requirements No requirements Materials can be purchased only right after the prototypes have been designed. Materials must be purchased before the prototypes can be manufactured. Both prototype manufacturing and staff input must precede the design revision. However, since prototype manufacturing precedes staff input, it is not an immediate predeoessor. The production run can begin after the design has been revised. Staff training begins after the prototype is designed. For staff input on prototypes, the prototype must be built and the staff trained. Immediate Predecessors H: Sales training Salespersons can be trained immediately after the design revision. I: Preproduction advertising campaign The initial preproduction advertising campaign can begin as soon as the prototypes have been designed. J: Post-redesign advertising The large-scale postproduction advertising campaign campaign begins when the initial ad campaign has been completed and the design has been revised. Here is the time each activity needed: Activity Time needed (days) A 90 B 15 C 5 D 20 E 21 F 25 G 14 H 28 30 45 a. Draw a network to represent this project b. What are the slack times of each activity? C. Find the critical path of the network d. What is the expected total project completion time? e . What is the total project completion time if activity I is delayed by 15 days? What is the total project completion time if activity G is delayed by 2 days? g. What is the total project completion time if activity B is delayed by 6 days? h. What is the total project completion time if activity B is delayed by 3 days and activity C is delayed by 3 days? i. What is the total project completion time if activity B is delayed by 3 days and activity I is delayed by 31 days? j. What is the total project completion time if activity B is delayed by 3 days and activity H is delayed by 15 days?Q3. Critical Path Method (CPM) The activity time of each activity is given in the table. Answer the following questions: a. What are the slack times of each activity? b. Find the critical path of the network c. What is the expected total project completion time? Activity Immediate Activity Time Predecessors A N/A 5 A C A 10 D B 2 F B, C, F 3 F A G E 4 H D 5