help me to get answer for Question 3.22 a,b,c

130 PART 1 INTRODUCTION TO OPERATIONS MAN ... 3.22 Four Squares Productions, a firm hired to coordinate the release of the movie Pirates of the Caribbean: Dead Men Tell No Tales (starring Johnny Depp), identified 16 activities to be completed before the release of the film. IMMEDIATE ACTIVITY PREDECESSOR(S) A MOST OPTIMISTIC LIKELY PESSIMISTIC TIME TIME TIME 1 2 4 3 3.5 4 10 12 13 4 5 7 B .. III D 4 E F 2 6 5 8 A 7 B 2 H C C 5 99 4 7.7 10 1 1 4 OYNNN S.5 9 12 5 6 6 6.5 2 4 4 K L M N 0 P D E F,G,H J. KL IM N 1 5 5 6 1.1 7 7 8 9 at) How many weeks in advance of the film release should Four Squares have started its marketing campaign? What is the critical path? The tasks (in time units of weeks) are as follows: b) What is the probability of completing the marketing campaign in the time (in weeks) noted in parta! c) If activities I and I were not necessary, what impact would this have on the critical path and the number of weeks needed to complete the marketing campaign:PX