Problem 1. A pump is to be installed on a concrete slab. The slab is poured in two parts, and. as only one set of shuttering is available, the first pour to be made is that which will carry the pump. After the first pour is cured, the pump installation can take place if the pump has been delivered and the requisite lifting tackle obtained. Shuttering is stripped before euring is complete, but the shuttering for the second pour is not erected until first pour is fully cured. We have the following list of activities: Activity Duration (in days) 1 1 1 1.5 (A) First shutter (B) First Pour (C) Start first cure (D) Finish first cure (E) Strip first shuttering (F) Second shutter (G) Second pour Duration Activity (in days) (H) Start second cure 0.5 (1) Finish second cure 1 (J) Strip second shuttering 1 (K) Deliver pump 1 (L) Install pump 1.5 (M) Obtain lifting tackle 0.5 2 5 (a) Draw the AOA network for this project. Then find the completion time as well as the critical activities