A small software development project has eight major activities. The times are estimated and provided in the table $1-2$ below. All times are in weeks. Answer Question # $6$ to $10$:

$\backslash$table$[[$Activity$,\backslash$table$[[$Optimistic$],[$A$]],$Most,Pessimistic,Immediate$],[,$Time,Likely Time,Time,Predecessor$($s$)],[$B$,3,4,5,--],[$C$,5,7,9,--],[$D$,2,3,10,$A$],[$E$,1,5,8,$B$],[$F$,3,7,7,$B$],[$G$,7,5,7,$C$,$ D$],[$H$,2,6,9,$D$,$ E$]]$