Find the exact extreme values of the function = f(x,y) = 3x-2xy +4y-6x-20y+17 subject to the following constraints: 0x5 0 y 6 Start by listing all nine candidates, including their z values, in the form (x,y,z): First, list the four corner points and order your answers from smallest to largest x, then from smallest to largest y. 1) ( 1 2) ( 3) ( 4) ( Next find the critical point. ) ) ) 5) (2 3 ' -19 ) Lastly, find the four boundary points and order your answers from smallest to largest x, then from smallest to largest y. 6) ( 7) ( " ) 8) ( 9) ( Finally, find the extreme values: fin = fmax = at (x,y) = ( at (x,y) = ( ( J,J)