Two sample problems

One of the following statements does not work. Fix it$.$ Please use a color to highlight the changes that you have made in the programs. No highlight, no points for the final exam.

Original statements:

$x=[1,2,3]$

$y=[4,5,6]$

$z=x^{**}y$

$\%$ The number of columns in $x$ equal the number of rows in $y.$ As such, a row vector cannot

$\%$ multiply with another row vector

$z=2**x$