A traffic engineer collected the eight $15-$minute traffic volume from $7$:$00$ am$-9$:$00$ am$.$ The eight $15-$minute traffic counts are $150,175,200,250,260,220,190,$ and $160,$ respectively $(7$:$00-9$:$00$ am $),$ what are the peak hour traffic volume and Peak Hour Factor $($PHF$)?$

A$.0\mathrm{.}68$

B$.0\mathrm{.}79$

C$.0\mathrm{.}89$

D$.0\mathrm{.}93$