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There are five activities in completing a meal. The processing time of each activity is given below, and the activities must be done in this sequence: The manager receives four proposals for the workload. Which of the following is MOST LIKELY to achieve efficiency? Hire five workers, and each of them is assigned to one activity. Hire four workers. Employee A prepares and washes, employees B and C cut, and employee D completes the remaining activities. Hire three workers. Employee A prepares, employee B washes and cuts, and employee C completes the remaining activities. Hire three workers. Employee A prepares and washes, employee B cuts and employee C completes the remaining activities. QUESTION 10 Which of the following statement about the critical activity is not TRUE? A critical activity is on one of the critical paths. The slack time of every critical activity is 0 . If the activity time of a critical activity decreases by 1 hour, the project duration decreases by 1 hour. If the activity time of a critical activity increases by 1 hour, the project duration increases by 1 hour. QUESTION 11 The following table shows the mean and variance time of all activities in an activity network: 93.14% 99.44% 87.92% 98.73%