Question 2 Write on paper for upvote please. Provide Exact values no decimals.

Given the function f(x, y) = 3x 2xy a) find the value of the directional derivative of the at the point (2, -1) in the direction v = (-12, 5). Give the exact value. b) Find the maximum value of the directional derivative and give the direction for which this occurs. c) Find the equation of the line tangent to the surface / (x, y) at the point (2, -1) in the direction v = (-12, 5)