The sequence of tasks for construction of house and their estimated time for completion are shown above: 1. Calculate the earliest time and latest time for completion of each task. 2. Calculate the total time for construction of house 3. Identify which tasks are on the critical path 4. Identify which tasks are not critical II. A contractor has received a contract for laying 8000 bricks from a builder. The contractor estimates that the productivity of each worker is 100 bricks a day. 1. Calculate the effort required in person days to complete the task. 2. If the contractor employs 10 persons calculate the schedule in calendar days to complete the task. 3. If the cost per person day is $100 calculate the cost to the contractor for laying 8000 bricks 4. If instead of the estimated 100 bricks a day the actual average productivity of the worker is 80 bricks a day calculate the effort, schedule and cost of laying 8000 bricks