Please provide a clear FBD and identify all the forces applied in the FBD.
(a) Draw the FBD of A and B when the wedge B impends to slide to the left. Friction is negligible except for the surface under B whose coefficient of friction is 0.20. (b) Determine the magnitude of P to start the wedge B to slide to the left.
Extracted text: 120 fb P B 80 lb