3. [17.48/33.34 Points] DETAILS PREVIOUS ANSWERS MY NOTES PRACTICE ANOTHER Find the exact extreme values of the function = = f (x,y) = 47x + 13y + 50 z = f(x, y) = 47 x + 13 y + 50 subject to the following constraints: y 20 y59 - x2 Complete the following: fmin = -9 - at (x,y) = ( -3 v , 0