Q$\mathrm{.}2.$ for the table below:

a$)$ Draw the node diagram

b$)$ perform the CPM computations $($ES$,$ EF$,$ LS$,$ LF$,$ TF$,$ FF$)$ for the schedule below.

$\backslash$table$[[$Activity$,$IPA,Duration,Lag$],[$A$,-,2,],[$B$,$A$,6,],[$C$,$A$,10,],[$D$,$A$,4,4],[$E$,$B$,7,],[$F$,$B$,5,3],[,$C$,,],[$G$,$C$,$ D$,3,],[$H$,$E$,$ F$,5,],[$I$,$G$,2,],[,$H$,,1]]$