Q $4$ For the function f$($x$)=(-3$x$)/($x$^(2)-16)$ find $($if they exist$)$:

$($vi$)$ regions where the function is concave up or concave down;

$($vii$)$ the vertical asymptote$($s$)$;

$($viii$)$ the horizontal asymptote$($s$)$;

$($ix$)$ the diagonal asymptote;

and hence sketch the function.