You are creating a customer database for the Lehigh Valley IronPigs minor league baseball team. Given the information below, complete the forward and backward pass, compute activity slack, and identify the critical path.

ID	Description	Predecessor	Time (days)
A	Systems	None	6
B	Subsystem A design	A	4
C	Subsystem B design	A	1
D	Subsystem C design	A	4
E	Program A	B	3
F	Program B	C	11
G	Program C	D	3
H	Subsystem A test	E	5
I	Subsystem B test	F	4
J	Subsystem C test	G	5
K	Integration	H, I, J	1
L	Integration test	K	3

\begin{tabular}{|c|c|} \hline What is the total slack on D? & days. \\ \hline What is the total slack on E? & \\ \hline What is the FREE slack on B? & \\ \hline What is the FREE slack on H ? & day(s). \\ \hline \end{tabular}