Let $$f(w,z) = e^{w\ln\!\left(z\right)}.$$

(a) Use difference quotients with $h=0.01$ to approximate each of the partial derivatives:
$f_w(2, 4) \approx$
$f_z(2, 4) \approx$ .

(b) Now evaluate the partial derivatives exactly:
$f_w(2, 4) =$
$f_z(2, 4) =$