a student was asked to find the equation of the tangent plane to the surface at the point . the student's answer was (a) at a glance, how do you know this is wrong. what mistakes did the student make? select all that apply. a. the answer is not a linear function. b. the (x - 5) and (y - 4) should be x and y. c. the partial derivatives were not evaluated a the point. d. the -131 should not be in the answer. e. all of the above (b) find the correct equation for the tangent plane.
