2. A catering manager has been asked to organize a banquet for 100 guests. Table 1 shows the key activities, their durations and precedence. a. Construct a network diagram b. Identify the critical activities c. Prepare a Gantt chart showing all the activities and the float available for the non-critical activities. d. What is the shortest time in which the project can be completed? Table 1 Banquet activities Activity A Prepare ingredients B Clear/clean room Duration Preceding (mins) activities 30 20