Suppose a project consists of the following activities. Activity Immediate Predecessors Time (Days) A None 5 B None 8 C A 4 D B, C 6 E B, C 4 F D 6 G E, F 4 (a) Draw the activity-on-node (AON) project network based on the table above? Only nodes and directed arrows are required in the network for full credit. Add a dummy start node with 0 activity time. (b) List all the paths in the network and calculate the completion time of each path for full credit. (c) What is the project completion time? Please give the reason for full credit.