For the following digraph $G$ with eight vertices $a,b,$dots,$g,h$ and twelve arcs the

result of a DFS$-$run is partially given, with values $x_1,$dots,$x_7$ left open, in the form

dis$/$fin$,$ where dis is the discovery$-$time and fin the finishing$-$time:

What are the values of $x_1,x_2,x_3,x_4,x_5,x_6,x_7?$ Show enough of your computation

to justify these values.