onsider the following system of three equations in three unknowns.

$2$x$13$x$2+$ x$3=1(1)$

$2$x$2+3$x$3=7(2)$

x$1+$ x$3=4(3)$

First write this system in the form Ax $=$ b$,$ where A is a matrix and x and b are vectors.

Second, write two lines of numpy code that use np$.$array$()$ to create A and b as numpy arrays.