Consider the AON graph of a project shown below$\mathrm{.}2$

Figure $19\mathrm{.}19$

The activity times are $3,4,2,5,7,2,2,$ and $3$ days for activities $A_1$ through $A_8,$ respectively. What is the critical path?

$A_1,A_2,A_3,A_4,A_8$

$A_1,A_2,A_3,A_6,A_7,A_8$

$A_1,A_2,A_5,A_7,A_8$

None of these options are the critical path