2. Construct a bar chart to use in managing the construction of a single span bridge. The identified activities are: There is only one crane available for pile driving and setting girders. The superintendent plans to use only one crew of carpenters and finishers for the concrete work. Determine the project duration in days. Are the two "Construct Concrete Approach Slabs" activities critical to the project completion? Explain your answer. You may complete this assignment using Excel