Could I possibly get a clear step by step explanation on how to go about solving this? Been having trouble with this problem, thanks!

Find the relative maximum and minimum values. f(X, y ) = e 7x-+ 9y2 +9 Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. The function has a relative maximum value of f(x,y) = at (x,y) = (Simplify your answers. Type exact answers. Type an ordered pair in the second answer box.) O B. The function has no relative maximum value. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. The function has a relative minimum value of f(x,y) = at (X,y) = (Simplify your answers. Type exact answers. Type an ordered pair in the second answer box.) O B. The function has no relative minimum value