Match the surfaces with the verbal description of the level curves by placing the letter of the verbal description to the left of the number of the surface. 1. z=2x2+3y2 2. z=(25−x2−y2)
​ 3. z=x−11​ 4. z=2x+3y 5. z=xy 6. z=x2+y2 7. z=(x2+y2)
​ A. a collection of concentric ellipses B. a collection of equally spaced parallel lines C. a collection of unequally spaced parallel lines D. two straight lines and a collection of hyperbolas E. a collection of unequally spaced concentric circles F. a collection of equally spaced concentric circles Note: You can eam partial credit on this problem.