Job A, B, C, D, E with processing times (days): 8, 2, 4, 6, 7 and immediate predecessors are - A, B, B, and C & D. Which activity along the critical path has a slack time of 2 days? O a. A O. c. C O d. D O e. None of the above. Clear my choice page Next page select the best answer Use the following scenario to answer the following four questions: A cashier at a department store can ring up 25 customers in every hour. About 15 customers enter the store every hour. What is the probability of having no customer purchase item(s) from the store at any given time? a. 20% b. 30% c. 40% Od. 60% e. 80%