In the following table the activities with their precedence sequence and expected time (weeks) are listed for Lillian Fok's construction project and on the right the precedence network is shown:

Activity	Nodes	Time (weeks)
J	1-2	12
K	1-3	8
L	2-4	6
M	2-3	3
N	3-4	4
O	4-5	7
P	3-5	7

1

3

K

2

M

4

5

J

L

O

N

P

In the diagram, there are 5 circles labeled using the numbers from 1 to 5. There are 7 arrows, and each arrow connects one circle to another circle. The arrows are situated in the following manner: Arrow J joins 1 to 2, Arrow K joins 1 to 3, Arrow L joins 2 to 4, Arrow M joins 2 to 3, Arrow N joins 3 to 4, Arrow O joins 4 to 5, and Arrow P joins 3 to 5.

Part 2

The project length is

2626

weeks.

Part 3

The activities on the critical path are