The City Commission of Nashville has decided to build a botanical garden and picnic area in the heart of the city for the recreation of its citizens. The precedence table for all the activities required to construct this area successfully is given. A. Draw the Gantt chart for the whole construction activity. Show Early Start, Early Finish, Late Start and Late Finish for all activities B. What the total project duration in hours ? C. What activities are on the critical path ? D. What is(are) the activities with largest slack ? How many hours of slack ?