Question $21$

construction project consists of the activities shown in the following table:

$\backslash$table$[[$Activity$,$A$,$B$,$C$,$D$,$E$,$F$,$G$,$H$,$I,J$],[$Duration $($Weeks$),9,4,8,7,3,6,4,8,7,3],[$Earliest Start,$0,0,9,9,4,16,16,22,17,22$