1. Perform three iterations of the conjugate gradient method on the following linear system of equations: х, + 2х, 2.x, = -15 2х, + х, 5x, = = -21 4х, + х, -18 Use °x, (1, 1, 1) %3D as the initial...

solve this iteration problem :

Extracted text: 1. Perform three iterations of the conjugate gradient method on the following linear system of equations: х, + 2х, 2.x, = -15 2х, + х, 5x, = = -21 4х, + х, -18 Use °x, (1, 1, 1) %3D as the initial solution vector. Clearly indicate the approximate solution at the end of each iteration.