Problem $1$

Please perform the forward pass and backward pass for the list of activities shown below and find out the ESD, EFD, LSD$,$ LFD for all the activities in the network. Put the information in the appropriate locations in each of the activity nodes $($DO NOT calculate any float$).$

$(15pts+5pts)$

$\backslash$table$[[$Activity List for Reroofing Project,Duration Days,Predecessors$*],[$Activity Description,$2,],[$A Move in$,3,$A$],[$B Set up scaffolds,$3,$B$/1],[$C Tear off old shingles,$2,$C SS$/1],[$D Inspect roof truss and deck,$3,$C FF$/2],[$E Remove old shingles to recycling yard,$1,$A$],[$F Purchase new shingles,$5,$C$,$ D$,$ F$],[$G Install new shingles,$3,$G$],[$H Clean up$,2,$H$],[$I Move out,,$]]$

"Under Predecessors, the following notation is used:

x$/$#: $$ctivity x must finish # days before this activity can begin.

$xS\frac{S}{?}$ #: The # of days after activity $x$ starts that this activity can begin.

$xF\frac{F}{?}$ #: This activity cannot finish until # days after $x$ is completed.

$xS\frac{F}{?}$ #: This activity must finish # days before $x$ can start.