Construct a bar chart to use in managing the construction of a single span bridge. The identified activities are: Drive piling west abutment (WA), 2 days Drive piling east abutment (EA), 2 days Construct WA cast in place pile cap, 3 days Construct EA cast in place pile cap, 3 days Each pile cap requires 5 days curing time before the precast girders can be placed. Set girders, 1 day Construction of cast-in-place concrete deck, 7 days Cure deck 14 days West and east concrete approach slabs, 5 days each There is only one crane available for pile driving and setting girders. The company plans to use only one crew of carpenters and finishers for the concrete work. a) What is the project duration? b) Are the two "construct approach slab" activities critical to the project completion