1. Use the Normal time given in the table below to reduce the project by 6 days. What is the added cost? Show the activity/activities that need to crash for each day. What activity to crash for the 1^st day, what activity to crash for the 2^nd day, and so forth.

				Time (days)		Activity cost (S)
Activity	Description	Predecessor	Normal	Crash		Normal	Crash
a	Excavation, pour footers	none	6	4		$10	20
b	Lay foundation	a	5	3		$22	28
c	Frame and roof	b	5	4		$15	22
e	Sewer (floor) drains	b	3	2		$21	25
f	Install insulation	c	5	4		$25	30
g	Pour basement floor	e	5	3		$12	18
i	Install windows	f	4	3		$20	22
J	Rough electrical wiring	f	3	2		$20	20
k	Install furnace	c,g	8	5		$11	23
l	Exterior brickwork	i	8	6		$16	28
m	Install plasterboard	j,k	10	8		$18	26
n	Roof shingles	I	4	3		$23	29
o	Attach gutter	n	5	2		$25	31
p	Grading	o	7	3		$12	16
q	Lay subflooring	m	5	4		$17	22
r	Lay driveway	p	8	6		$20	30
t	Kitchen, sink, appliances	q	8	4		$18	28
v	Painting	t	8	6		$15	24
w	Finish wood floor	v	8	6		$25	34