$1$b$.25$ Points.$-$ Obtain the cyclic convolution of the sequences below:

$x[n]=e^{+j\frac{2}{4}n}+e^{-j\frac{2}{4}n},nin{Z}_4$

$h[n]=[n-2],nin{Z}_4$

$y[n]={\displaystyle \underset{k=0}{\overset{k=3}{}}}x[k]h[($:$n-k$:${)}_4]={\displaystyle \underset{k=0}{\overset{k=3}{}}}h[k]x[($:$n-k$:${)}_4],nin{Z}_4$

Use a matrix$-$vector product operation to perform your computation.