A 20.0-m -long uniform beam weighing 640 N rests on walls A and B, as shown in the figure.
![979_A uniform beam rests on walls.jpg](https://secure.tutorsglobe.com/CMSImages/979_A%20uniform%20beam%20rests%20on%20walls.jpg)
Part A
Find the forces that the walls A and B exert on the beam when the person is standing at a point 3.3 m to the right of B.
Part B
Find the forces that the walls A and B exert on the beam when the person is standing 3.7 m to the right of A.