2. NYC Real Estate is purchasing an old office building in order to renovate it. The renovation project consists of 7 activities which are given below. The duration of each activity is given in weeks and the precedence relationships among the activities are given as well. Description Immediate Predecessors Activity A Duration (weeks) Secure Financing 3 B Hire Employees - 9 C Buy Materials A 7 D Purchase Property A 1 E Clean Old Building D 2 F Perform Renovation B,C,E G Sign Tenants D 550 a. Draw the precedence diagram for this project.