The forces on the bridge truss described in the opening to this chapter satisfy the equations in the following table

This linear system can be placed in the matrix form

a. Explain why the system of equations was reordered.

b. Approximate the solution of the resulting linear system to within 10⁻² in the l∞ norm using as initial approximation the vector all of whose entries are 1s and the SOR method with ω = 1.2

Joint Horizontal Component Vertical Component -f2 + fs=0 fg-10.000 = 0 00000 ,0 0 0 Fi F2 F,fs 0000100 0 0 1212 0 0 54. 0100 10001000 0