(2points) 6. The nal answer to the following question is incorrect. Tell me, in your words, about the mistake that was made. Question: Find the derivative of f (20, y) = 5xy y2 at the point (2,0) in the direction of 72' + 83'. Solution: Step 1: Qt 5y Step 2: i 5ac 2y Step 3: Vf= ( 5y)2' +( 5x 2y)j Step 4: Vf|( _20) 02'+10j Step 5. 0mg] f (0, 10) (7, 8) Step 6: D7i+8j f = 80 (nal answer)