You have signed a contract to build a garage for the Simpsons. You will receive a $500 bonus for completing the project within 30 working days. The contract also contains a penalty clause in which you will lose $100 for each day the project takes longer than 30 working days.

Given the information below, complete the forward and backward pass, compute activity slack, and identify the critical activities.

ID	Description	Predecessor	Time (days)
A	Prepare site	None	6
B	Pour foundation	A	1
C	Erect frame	B	5
D	Roof	C	2
E	Windows	C	3
F	Doors	C	4
G	Electrical	C	3
H	Rough-in frame	D, E, F, G	5
I	Door opener	F, G	2
J	Paint	H, I	1
K	Cleanup	J	5

The critical activities are

The early start on activity D is

The late start on Activity E is

The slack on activity E is

The slack on Activity F is