$1-(15$ pts$)$ During the weekday peak$-$hour, traffic counts are:

$7$:$00$ a$.$m$.$ to $7$:$15$ a$.$m$.$: $355$ veh in $15$ minutes

$7$:$15$ a$.$m$.$ to $7$:$30$ a$.$m$.$: $475$ veh in $15$ minutes

$7$:$30$ a$.$m$.$ to $7$:$45$ a$.$m$.$: $467$ veh in $15$ minutes

$7$:$45$ a$.$m$.$ to $8$:$00$ a$.$m$.$: $343$ veh in $15$ minutes

Based on these traffic count data, what is the value of PHF$?$ What is the value of $$ in veh$/$h$?$