Find the domain of the given function: f(x, y) = 5 In( ) a) Of(x, y)l x # y} b) Of (x, y)l xzy} c) Of(x, y)I (x, y) is in the first or third quadrant, excluding the axes} d) Of(x, y)I (x, y) is in the second or fourth quadrant, excluding the axes} e) Of(x, y)I (x, y) = (0, 0) } f) O None of the above