7) Let F be a force acting at any point (x,y)on the coordinate plane by F=(x-1)i+(y-2)j. Assume that this force is acting on the house at the point B only

and causes a displacement of the house 3 units to the left parallel to the x-axis. a) Sketch on the same co-ordinate plane in red the Force F. b) Find the work done by F on the house.