Given the project network shown below, the amount of slack for activity b is:

A precedence network with $7$ nodes.In the precedence network the start node is a and the end node is g$.$ The paths in the network are as follow:a$-$b$-$e$-$g;a$-$b$-$d$-$e$-$g; a$-$b$-$d$-$f$-$g; a$-$c$-$d$-$f$-$g; a$-$c$-$d$-$e$-$g; The time associated with each node is as follows: a$,4$; b$,5$; c$,7$; d$.2$; e$,3$; f$.3$; and g$.6.$

Multiple Choice

$1$

$2$

$4$

$3$

$0$