Solve each of the following systems using naive Gaus$-$

sian elimination $-$ that is$,$ forward elimination and back

substitution. Only use multiplication and replacement operations, no row swapping.

b$.3x_1+2x_2-5x_3=0$

$2x_1-3x_2+x_3=0$

$x_1+4x_2-x_3=4$

e$.x_1+3x_2+2x_3+x_4=-2$

$4x_1+2x_2+x_3+2x_4=2$

$2x_1+x_2+2x_3+3x_4=1$

$x_1+2x_2+4x_3+x_4=-1$