WeBWorK Standalone Renderer

Consider the cone shown below.

figure of a cone with circular base on the xy-plane, centered on the z-axis, and point on the positive z-axis.

If the height of the cone is 6 and the base radius is 3, write a parameterization of the cone in terms of $r = s$ and $\theta = t$ .

$x(s,t) =$ ,
$y(s,t) =$ , and
$z(s,t) =$ , with
$\le s\le$ and
$\le t\le$ .

You can earn partial credit on this problem.