I. If , y > 0, let f(x, y) - - sin( (") Then the difference lim lim f (c. y) - lim lim f(c. y) (a) is equal to 3 (b) is not defined (i.e. one of the limits does not exist) (c) is equal to -3. (d) is equal to () (e) is equal to 9 (f) None of the other options is correct