Project activity for the design and fabrication of a high-endurance drone for medicine delivery has been formulated by a group of students shown in the table below. They wish to use the critical path concept to help guide their project timelines. (a) Draw a network diagram that represents the project activities as given in the table (b) Calculate the earliest start (ES) time and earliest finish time (EF) and put them beside each node in the network diagram Activity A B C D E F G Preceded by M B B B A. C D. F Estimated completion time (days) 4 3 3 2 2 1 3