2. Sketch a contour diagram of a differentiable function of two variables and mark three points A, B, and C 0n the diagram such that all of the following conditions are satised. 0 The gradient vectors atAand at B are parallel. o The gradient vector at A is orthogonal to the gradient vector at C. o The length of the gradient vector at A is smaller than the length of the gradient vector at B, which is in turn smaller than the length of the gradient vector at C