Draw the activity network diagram. Calculate the forward and backward pass to identify Early start, early Finish, Late Start & Late finish. Calculate Slack or Float to find out which are critical activities and highly Critical Path in such a case. Observe the following table Activities Predecessors A B C UD E FGH G H - A B D E C,F D H Duration 4 3 1 15 5 4 6 2 4 2