Find the local maximum and minimum values and saddle point(s) ofthe function. If you have three-dimensional graphing software,graph the function with a domain and viewpoint that reveal all theimportant aspects of the function. (Enter your answers as acomma-separated list. If an answer does not exist, enter DNE.)
1) f(x, y)= x3 + y3− 3x2 −3y2 − 9x
a) local minimum value
b) local maximum value
c) saddle point (x,y,f)
2) f (x, y) = x2 + xy +y2 + 8y
a) local minimum value
b) local maximum value
c) saddle point (x,y,f)
