1. Dayagsky Construction Firm, Inc. will soon begin to work on a building for US tea that was initially started by another firm that has gone out of business. The construction firm's schedule of activities and related expected completion time for US tea project are presented in the following time table: Activity Code A-B B-E B-C C-E C-D D-E E-F F-G Activity Description Obtain on-site work permits Repair damages done by vandals Inspect construction materials left on site Order and receive construction materials Apply for waiver to add new materials Obtain waiver to add new materials Perform electric work Complete interior partitions Estimated Time (in weeks) 2 8 1 2 2 3 6 4 REQUIRED: a. Prepare the PERT Network for the US Tea project b. What is the critical path and its expected time in weeks? c. What is the shortest path and its slack time in weeks