a) Table 1 shows activities in the project for building a new pharmacy. Answer the following questions. Activity A Table 1 Immediate Predecessor Duration (week) 4 B 6 A 4 D A,B 3 E B 9 F CD 4 E F G H D 4 H E 6 i) Draw the network diagram with earliest start and earliest finish time for each activity. [6 marks) ii) Calculate all the activity slacks. [8 marks) Identify the critical path. [2 marks]