You are given a training set of data points $\{x^{(n)}{\}}_n=1^3$ where $n{R}^5.$ Each point has

an associated class label yin$\{1,-1\}.$

$x^{(1)}={\left[\begin{array}{ccccc}-1& 2& 2& -2& 0\end{array}\right]}^{TT},y^{(1)}=-1$

$x^{(2)}={\left[\begin{array}{ccccc}1& 1& 0& -1& -1\end{array}\right]}^{TT},y^{(2)}=1$

$x^{(3)}={\left[\begin{array}{ccccc}-2& -4& 2& 1& 0\end{array}\right]}^{TT},y^{(3)}=-1$

$($a$)$ Use a $k-$NN classifier with $k=1$ to classify a test point at ${\left[\begin{array}{ccccc}0& 1& 0& -1& 2\end{array}\right]}^{TT}$

$($b$)$ Give an example of something that could be represented with a $5D$ data point.