Please help. Please show step by step. I have asked this question already and it was wrong.

3. Pirmin's Bike Shop is behind on a custom bike and needs to crash 8 hours of time from the 8-step project. (10 points)

Activity	Normal Duration (hours)	Normal Cost ($)	Crash Duration (hours)	Crash Cost (S)	Immediate Predecessors	Crash $ per hour	How Many Hours	Slack
A	2	$10	2	$10	None
B	3	$15	2	$23	A
C	5	$25	3	$37	B
D	3	$20	1	$24	B
E	6	$30	4	$44	C
F	1	$5	1	$5	C
G	7	$35	6	$45	E, F
H	10	$50	7	$77	D,G

1. Draw the network diagram. (2.5 points)
2. Given the project table above calculate the crash cost for 8 hours of time-savings. (2.5 points)

Suppose Pirmin calls the customer and asks for a project extension, reducing the amount of time he needs to crash.

3. Calculate the maximum time-savings available on a $20 crash budget and given the crash sequence (2.5 points)
4. Calculate the cost to crash four hours of savings and give the crash sequence. (2.5 points)