Construct an activity network diagram using Table 3a. (5marks) Activity Preceding Activity Duration in Weeks Start 0 A Start 4 B Start 7 C A&B 6 F B 6 D C &F 9 G F 11 E G &D 12 I E&H 8 H G 9 J H 10 End J&I Table 3a Activity Durations and relationship i. Conduct a forward and backwards pass for the activity network Diagram you have constructed and identify the critical and its duration. (10 Marks) ii. Calculate the float on Activity A. and proceed to analyze how knowing the float can help to manage project schedule risk on a project (5Marks) 3b. Assuming that there is the risk of exceeding the project schedule baseline of 44 Weeks, critically evaluates the options available that could be used to bring the project on track (10 marks).