39. A map of a city and suburbs shows an airport located at A(25, 11). An ambulance is on a straight expressway headed from the airport to Grant Hospital at G(1, 1). The ambulance gets a flat tire at the midpoint M of AG. As a result, the ambulance crew calls for helicopter assistance. a. What are the coordinates of point M? b. How far does the helicopter have to fly to get from M to G? Assume all coordinates are in miles