**Show a network diagram for this problem.

** Find the ES, EF, LS, LF for each activity.

2. A competitor of Kozar International, Inc. has begun marketing a new instant-developing film project. Kozar has had a similar product under study in its research and development (R\&D) department but has not yet been able to begin production. Because of the competitor's action, top managers have asked for a speedup of R\&D activities so that Kozar can produce and market instant film at the earliest possible date. The predecessor information and activity time estimates in weeks are as follows