Activity 4 in a network diagram has an optimistic duration estimate of 5 days, a most likely duration estimate of 7 days, and a pessimistic duration estimate of 10 days. The expected duration of Activity 4 is: Select one: a. 6 b. 8 c. 5 O d. 7 e. 9 Question 100 Answer saved Marked out of 3.00 Given an order cost of $100, a, per period holding cost of 8.50, and the following requirements schedule: Pd 2 3 4 5 6 Dmd 120 80 80 70 100 60 1 P Flag Question If the firm is using lot size for a fixed period of two, what is the order size for the first order? Select one: o a. 200 b. 150 c. 160 d. 280 e. 120