The lp$-$norm of a vector x $=($x$1,...,$ xn$)$ is defined as $\backslash |$ x$\backslash |$ p :$=($n

i$=1|$xi$|$p$)1/$p$.$ Write a function called

l$\_$p to compute $\backslash |$ x$\backslash |$ p$.$ The inputs are x and p$,$ and the output is $\backslash |$ x$\backslash |$ p