1. Gannt Chart Contractors for a building restoration project will have to do the following: Wall/Ceiling Activities A Strip the existing wall paper B Clean and repair the walls/ceilings C Paint the walls/ceilings Flooring Activities D Remove old carpeting E Lay a floor foundation F Install , stain, and seal hardwood flooring G Install rugs and carpet runners Exterior Activities H Sand and repair outside wood surfaces 1 Paint the exterior For the precedence relationships of the activities, assume the following: 1. The wall/ceiling activities, the flooring activities, and the exterior activities are listed in the order in which they are to be performed. 2. Cleaning and repairing the walls/ceilings, removing the old carpeting, and sanding and repairing the exterior must precede any painting activity (interior and exterior). 3. The walls/ceilings must be painted before the hardwood flooring is installed, stained, and sealed. 4. All painting interior and exterior) must be completed before new rugs and carpet runners are installed. 5. Stripping the wallpaper, removing the old carpeting, and sanding and repairing the exterior may all start at the same time. a. If the estimated time of each wall/ceiling activity is two weeks, the estimated time of each flooring activity is one week, and the estimated time of each exterior activity is three weeks, fill out the immediate Predecessoris column in the table below and draw the Gannt Chart corresponding to this project. (20 pts) Weeks after start Immediate Activity Predecessors o 1 2 3 4 5 6 7 8 9 10 A B D E F G H 1 b. What is the expected project completion time? c. Which are the critical activities