(1 point) Calculate all four second-order partial derivatives and check that fxy = fox. Assume the variables are restricted to a domain on which the function is defined. f (x, y) = exy J XX = fo = fxy = Jyx=(1 point) Find the partial derivatives of the function f (x, y) = xye 4y fx (x, y ) = y/e^(4y) fy(x, y) = xe^(-4y)-4xye^(-4y) fxy (x, y) = 1/((ye^(-4y)(yx,y^(2) + 4x-(x/y) fyx (x, y) =(1 point) Find the first partial derivatives of x - 2y f (x, y) = at the point (x, y) = (2,3). x +2y of (2, 3) = Ox of (2, 3) = dy