4) A low-cost housing development consisting of 5 identical houses. The activities to build the housing are as follows: Activity Foundation Duration 3 2 Slab Wall Roof Use one day unform buffer between any activity whenever you think the buffer is important. Calculate the following a) If you only have one team to work on this project, how long this project will take to complete. b) If you have separate teams to work on each activity, how long this project will take to complete