A train is moving parallel and adjacent to a highway with a constant speed of $\backslash (31\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}\backslash ).$ A car is traveling in the same direction as the train at $\backslash (52\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}\backslash ).$ The car's horn sounds at $540$ Hz and the train's whistle sounds at $350$ Hz $.$

When the car is behind the train what frequency does an occupant of the car observe for the train whistle? The speed of sound is $\backslash (343\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}\backslash ).$

Answer in units of Hz $.$

$014($part $2$ of $2)10\mathrm{.}0$ points

When the car is in front of the train what frequency does a train passenger observe for the car's horn?

Answer in units of Hz $.$