This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise Find the maximum rate of change of fat the given point and the direction in which it occurs. f(X. y) = sin(xy), (4, 0) Recall that the direction in which the maximum rate of change of f(x, y) occurs at a point (a, b) is given by the vector Vf(a, b). For f(x, y) = sin(xy), we have Vf(X. y) = 7 3: Submit Emigou cannot come back)_