note A and B do not have predecessors

1. [25 points) CmCsT Co would like to expand its cable TV in Megantown, the information of all activities needed to achieve this goal is shown in the following table. Activity Description Predecessors Duration(weeks) A Choose stations 2 B Get approval from town council 4 Order converters for expansion B 3 D Install new dishes A 2 E Install converters CD 10 F Change billing system B 4 Draw the project diagram, and find the critical path, total durations, and free floats for all activities. Requirements: You need to show the iterations of the algorithms (worth most of the points). Only showing an optimal solution will not be given full credits