For the function f(x,y) = xe by, find the slope in the x-direction and the slope in the y-direction at the point (2,0,4). Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The slope in the x-direction at (2,0,4) is (Simplify your answer.) O B. The slope in the x-direction is not defined. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The slope in the y-direction at (2,0,4) is (Simplify your answer.) O B. The slope in the y-direction is not defined