. You are asked to design a software package for the robotic floor sweeper (RFS). The RFS will take commands from its user. The commands include clean floor with various types such as wooden floor, marble floor, carpeted floor); clean floors on House xxx, House xxx may have number of floors, floor types, floor size, floor shapes, etc..; clean the floor in mm minutes. When the debris collector is full, a software entity will notify the user to take action. When the operating hours is over the threshold, a software entity will ask the owner for maintenance.

There is another device designed to clean the windows, it is called Robotic Window Sweeper, RWS for short. In your opinion, which part of the software package in RFS can be reused in RWS? Which can not be reused? From hardware point of view, the device may have multi-legs so that it can go from one piece of the window to another piece; or the device can be a cleaning broom installed on a drone with operator on the cleaning site.