WeBWorK Standalone Renderer

Given $z=f(x,y),\quad x=x(u,v),\quad y=y(u,v)$ , with $x(3,3) = 4$ and $y(3,3) = 4$ , calculate $z_v(3,3)$ in terms of some of the values given in the table below.

$f_x(3,3) = q$	$f_y(3,3) = s$	$x_u(3,3) = p$	$y_u(3,3) = c$
$f_x(4,4) = b$	$f_y(4,4) = 3$	$x_v(3,3) = a$	$y_v(3,3) = -5$

$z_v(3,3) =$