a$)$ Develop the precedence diagram, calculating ES$,$ EF$,$ LS$,$ LF$,$ TF for each activity

b$)$ Indicate the critical path

c$)$ What is the shortest possible duration of the project?

d$)$ What's the total float for activity I, and explain the meaning of using total float.

$\backslash$table$[[$Activity$,\backslash$table$[[$Duration$],[($Working Days$)]],\backslash$table$[[$Activity immediately$],[$following$]]],[$A$,9,$E$,$ F$],[$B$,11,$H$,$ I, J$],[$C$,45,$M$],[$D$,30,$N$],[$E$,8,$H$,$ I, J$],[$F$,17,$G$,$ J$],[$G$,23,$L$],[$H$,10,$K$],[$I$,6,$L$],[$J$,10,$L$,$ N$],[$K$,10,$P$],[$L$,14,$P$],[$M$,18,$O$,$ P$],[$N$,25,$R$],[$O$,15,$Q$],[$P$,12,$R$],[$Q$,10,],[$R$,6,],[,,]]$