Need urgent help!!

The activity table is given below.

Activity	Predecessor	Duration	ES	LF
0 1	Clear site	3	0	3
1 2	Survey and layout	2	3	5
2 3	Rough grade	2	5	7
3 4	Drill wel	15	7	22
3 - 6	Water tank foundations	4	7	12
3 9	Excavate sewer	10	7	21
3 10	Excavate electrical manholes	1	7	21
3 12	Pole line	6	7	29
4 - 5	Well pump	2	22	24

1. Draw the CPM network with path duration and determine the critical path
2. Draw the CPM path with ES, EF, LS, LF and determine the critical path.