Current Attempt in Progress

Suppose that $z=f(x,y)$ is differentiable at the point $(243,27)$ with $f_x(243,27)=6$ and $f_y(243,27)=-3.$ If $x=t^5$ and $y=t^3,$ find $\frac{dz}{dt}$ when $t=3.$

$\frac{dz}{dt}{|}_t||=3=$