Warren is an air conditioning technician employed by Polar Heating and Air. Warren drives a Polar truck and makes service calls to repair air conditioning units at client properties. Warren was driving from one appointment to another appointment but, because he was ahead of schedule, drove a couple of blocks off his route to mail a package to his son. While parking in the post office arking lot, Warren struck another car.

Explain whether Polar is liable for the damages caused by Warren. Include a full discussion of the factors that may be important in this determination.