(a) Determine the reactions and all bar forces of the three-hinged, trussed arch in Figure...

(a) Determine the reactions and all bar forces of the three-hinged, trussed arch in Figure P6.27 for the following cases:

Case A: Only the 90-kN force at joint D acts.

Case B: Both the 90-kN and 60-kN forces at joints D and M act.

(b) Determine the maximum axial force in the arch in Case B.

Figure P6.27: