A network consists of the following list. Times are given in weeks.

$\backslash$table$[[$Activity$,$Preceding,$\backslash$table$[[$Optimisti$],[$c $($a$)]],\backslash$table$[[$Probabl$],[$e $($m$)]],\backslash$table$[[$Pessimist$],[$ic $($b$)]]],[\frac{?}{\text{b}\text{a}\text{r}}(A),,7,9,10],[$B$,\frac{?}{\text{b}\text{a}\text{r}}(A),\frac{?}{\text{b}\text{a}\text{r}}(2),\frac{?}{\text{b}\text{a}\text{r}}(2),8],[\frac{?}{\text{b}\text{a}\text{r}}(C),\frac{?}{\text{b}\text{a}\text{r}}(A),4,12,16],[\frac{?}{\text{b}\text{a}\text{r}}(D),\frac{?}{\text{b}\text{a}\text{r}}(A),3,7,10],[\frac{?}{\text{b}\text{a}\text{r}}(E),B,4,6,8],[\frac{?}{\text{b}\text{a}\text{r}}(F),\frac{?}{\text{b}\text{a}\text{r}}(B),6,8,10],[\frac{?}{\text{b}\text{a}\text{r}}(G),\frac{?}{\text{b}\text{a}\text{r}}(C,F),,3,\frac{?}{\text{b}\text{a}\text{r}}(4)$