A subcontractor needs to install flooring. In the area has old vinyl tile, it must be removed and replaced by with new vinyl tile. Additionally, the concrete slab needs to be topped with ceramic tile. This simple project is broken into the activities shown in the following table:

Activity ID	Activity Description	Predecessor	Duration (Day)	Labor
A	Purchase & delivery materials	-	5	2
B	Remove old vinyl tile	-	7	4
C	Install ceramic tile	A	3	3
D	Install new vinyl tile	A, B	5	3
E	Clean-up & inspect	C, D	2	2

1. Draw the resource histogram based on early start schedule.
2. If the maximum number of labors available to utilize each day is 4, does the subcontractor able to accomplish this project on time? Show all your calculations.
3. Level the resource so that the subcontractor does not use more than 6 labors at each day.