An officer receives a call from dispatch informing him of a robbery in progress at a convenience store near a busy intersection in the middle of town. The officer proceeds to the scene without lights and siren so as not to alert the suspects that police are arriving. The officer arrives just south of the scene but remains out of sight of the store and notifies dispatch of his arrival. Soon thereafter, back up arrives and parks on the north side of the scene to cover the store from there. Upon the approach to this robbery, where should the first officer on the scene be positioned? Near the front to cover the main doors Near the most likely exit from the robbery scene Near the back to cover the rear exit If possible, the roof is the objective in order to direct all other officers