IN MATLAB, Use vectors x $=[1,3,9,15]$ and y $=[4,1,1,8]$ and compute the following using for loop. $[10$ points$]$

$($a$)$ a$=$ xy

$($b$)$ b $=$ x $/$ y

$($c$)=$ reciprical of the smaller of x and y

$($d$)$ d$=$ x$/($x$^2+$ y$^2)$