HW5: Problem 3 (1 point) . Find the equation of the tangent plane to the surface z : cos(;c) cos(5y) at the point (727172, 7271/2, 1). Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. HW5: Problem 4 (1 point) Find the differential of the function z : e'y cos(ac). dz: Preview My Answers Submit Answers You have attempted this problem 0 times. \\I... L.... ..H|:_A:;-.i -u-_._;- w