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Evaluate the limit. Vx+y -3 lim (x,y)-(1,8) x+y-9 1x+y -3 Find an expression that is equal to f(xy) = x+ y -9 -. for all (xy) in the domain of f, that will be better suited to find the limit, if it exists. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. Vx+y -3 O A for all (x.y) in the domain of f. x+y-9 (Simplify your answer.) B. The function f(x,y) is already in a form suitable for finding the limit, if it exists. Evaluate the limit. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. Vx+ y - 3 O A. lim (Simplify your answer.) (x,y) - (1.8) x+y- 9 O B. The limit does not exist