I need help with these this problem please, and please make it legible and answer all parts. I've been trying to get help with this for nearly two days with no luck.

Part 1 of 3 Find all the local maxima, local minima, and saddle points of the function. f (x,y) =x - 18xy +y3 . . . . . Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. A local maximum occurs at (Type an ordered pair. Use a comma to separate answers as needed.) The local maximum value(s) is/are (Type an exact answer. Use a comma to separate answers as needed.) O B. There are no local maxima