Evaluate the network diagram in Figure 6-18 on page 196 of the Project Management Textbook.In each box, the letter on the left is the name of the activity, and the number on the right indicates the activity duration in days.Use the forward and backward pass to figure out the earliest start time, earliest finish time, latest start time, and latest finish time at each activity.What is the critical path in the diagram in Figure 6-18?What is the duration of the critical path? Check your work against Figure 6-19 on page 197 of the Project Management Textbook