Locating a fire station $($Fire Car$)$

Monroe County is trying to determine where to place the county fire station. The locations of the county$$s four major towns are as follows: $(10,20),(60,20),(40,30),$ and $(80,60).$ Town $1$ averages $20$ fires per year; town $2,30$ fires; town $3,40$ fires; and town $4,25$ fires. The county wants to build the fire station in a location that minimizes the average distance that a fire engine must travel to respond to a fire. Because most roads run in either an east$-$west or a north$-$south direction, the fire engine must do the same.