Steps for

Draw a network diagram using proper legends of ES$,$ LS$,$ ID$,$ EF$,$ LF$,$ Description, total slack and identify the critical path $(22)$

Drug development project $||$

$\backslash$table$[[$Activity ID$,$Description,$\backslash$table$[[$Preceding$],[$activity$]],$Activity time$],[$A$,\backslash$table$[[$Define end points for$],[$Product filing$]],,20$ workdays$],[$B$,$Phases $1$ & $2$ Study,A$,\backslash$table$[[20],[$Workdays$]]],[$C$,$Phase $3$ study,B$,\backslash$table$[[80],[$Workdays$]]],[$D$,\backslash$table$[[$Phases $1$ & $2],[$Documentation$]],$B$,\backslash$table$[[20],[$Workdays$]]],[$E$,$Phase $3$ Documentation,C$,$ D$,\backslash$table$[[40],[$Workdays$]]],[$F$,$Submission,E$,\backslash$table$[[20],[$Workdays$]]]]$