Given the project within the table below, calculate the following:

Activity	Duration (hours)	Immediate Predecessors
A	4	None
B	8	None
C	6	A
D	7	B, C
E	3	D
F	1	E
G	5	E, F
H	4	G

a. What is the project's minimum completion time? [ Select ] ["28", "25", "29", "27", "30"]

b. What is the critical path in the project? [ Select ] ["B, D, E, F, G, H", "C, D, E, F, G", "B, C, D, E, F, G", "A, C, D, E, G, H", "A, C, D, E, F, G, H"]

c. What is the slack for activity B? [ Select ] ["2", "0 - it is on the critical path", "5", "4", "3"]

d. What is the Early Start and Early Finish for Activity D? [ Select ] ["12, 19", "8, 15", "18, 25", "0, 7", "10, 17"]

e. What is the Late Start and Late Finish for activity B? [ Select ] ["6 and 12", "0 and 8", "2 and 10", "7 and 13", "3 and 11"]

f. What would happen to the overall project length if activity B now took an additional 3 hours to complete, now taking a total of 11 hours? [ Select ] ["the project time would be reduced by 3 hours because activity B is on the critical path. The project would now be 27 hours", "the project length would decrease because activity B has 3 hours worth of slack", "the project length would remain the same, because B is a non-critical activity", "The project would increase by 1 hour, because B has a slack of 2 hours - the project is now going to take 31 hours"]