Problem 4: Calculate the partial derivatives and gradient of the following function. Compare the results of (c) and (d). (2+2+2+2+2+2+3=15 points total) f(x, y, z) = cos(x) sin (y)exp(z) of = ? 23 f -= ? af-? C. af = ? d. e. of b. oxovoz ax axdy avox a. = ? Ox f. Vf (x, y. z ) =? g. V' f ( x, y. z ) =