Find a unit normal vector for the following function at the point P(2, 5, 8): f($ay) 933 (Please show your answer accurate to 4 decimal places.) Hint: Write your answer as a vector (a, b, ) with a negative z component Question Help: [] Video Submit Question Find a unit normal vector to the surface f(z,y, z) = 0 at the point P(1, 2, 5) for the function 3T f(z,y,2) :ln(4y_ z) Please write your answer as a vector (a, b, c) with a negative z component, and show your answer accurate to 4 decimal places sl Question Help: [] Video Submit Question Find the equations of the normal line to the surface 2= 69::7y5 at the point (1, 2, 192). z=t192 Question Help: [] Video Submit