Question 2 (a) In the following project, complete the expected time" and the "variance" columns of each activity. Hence, find the critical path based on the expected time. (All times shown in the table are in days) Activity Pessimistic Variance Immediate predecessor(s) Optimistic a Most likely m Expected time 10 ANO 10 ua 9 A BD 7 BD C,E,F GH (b) What is the project's expected completion time and the corresponding variance? (c) Find the probability that the project can be completed between 21 and 23 days. Question 3 Apple Inc. is about to introduce a new product. The new product is manufactured by assembling Product A and Product B. Below listed the required activities in producing the new product with the duration for cach activity. Activity Description Duration Immediate Max. no. of Extra cost to (days) predecessor(s) days the activity reduce the can be reduced activity by 1 day Purchase raw $10 materials Hire and train workers $20 Produce product A Produce product B $40 Safety check for 10 product B $30 F Assemble products A and B $50 (a) Identify the critical path and determine the project completion time. (b) How much time can activity C be delayed without affecting the project duration? (c) Suppose the new product must be released in 32 days, explain how Apple Inc. could achieve the 32-day target with minimum extra cost. What is the minimum extra cost incurred