$($b$)$ Draw the network for the project based on the following data of events. Find the Early start time, Early finish time, and determine the least number of days required to complete the work. Also draw the critical path.

$(8)$

$\backslash$table$[[$Event$,$Duration $($Days$),$Preceeders$],[$A$,2,-],[$B$,4,-],[$C$,1,$A$],[$D$,6,$B$],[$E$,7,$C$,$D$]]$