36 Dream Team Productions is in the final design phases of its new film, Killer Worms , to be released next summer. Market Wise, the firm hired to coordinate the release of Killer Worms toys, has identified 16 activities to be completed before the release of the film. These activities, their immediate predecessors, and optimistic ( a ), most likely ( m ), and pessimistic

( b ) time estimates are given in the table on the next page.

(a) How many weeks in advance of the film release should Market Wise start its marketing campaign?

What are the critical paths?

(b) If activities I and J were not necessary, what impact would this have on the critical path and the number of weeks needed to complete the marketing campaign?