Please explain your response to each question

Problem 3: [20 pts] A contour plot for a dierentiable function f(a:,y) is shown beiow. / _9\\ The vaiue that z = x, 3;) takes along each contour is listed; for instance f (B) = 3. Additionally, x, 3;) either strictly increases or decreases between contour lines and V f 75 0 at Points A, B, C, or D. A. [6 pts] (Select All): Indicate at which points, if any, the following conditions hoid. You do not need to justify your responses. I [2 pts] At which of points below is y > 0'? 6y Point A. Point B. Point C. Point D. o [2 pts] At which of the points below is 3: = 0? Point A. Point B. Point 0. Point D. o [2 pts] Let it be a unit vector that extends from Point A to Point C and let it be the unit vector that is in the same direction as Ti. Fill in the bubble to the left of each point where 0:; f