Show that if the original atomic orbitals are orthonormal, then the linear combinations of (1.11.3) are also orthonormal.

V/1 = (s + x + y+z) [111] V/ = 1/2 (0 + 0 x - y-0) [111] V3 = 1/2 (0s - Qx + y [l] [111]. - dx + y - 0) V4 = (0s - Ox - y + ). x (1.11.3)