Q$.1$ The activity table is given below

$\backslash$table$[[$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,$2,22,24]]$

a$)$ Draw the CPM network with path duration and determine the critical path

b$)$ Draw the CPM path with ES$,$ EF$,$LS$,$LF and determine the critical path

$10$N