Find the local maximum and minimum values and saddle point(s) of the function. If you have three-dimensional graphing software, graph the function with a domain and viewpoint that reveal all the important aspects of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)

f(x,y) =x³48xy+64y³

^{local max values: ___________________________}

^{local min values :____________________________}

^{saddle points :_______________________________}