In problems 3 - 6, find the area enclosed by the given curves. (Use a variable that is appropriate.) 3. y = sin x 4. In x V = y = x + cos x X x = 0, x = 1 y = x' - 5x +4 x = 1, x =4 5. y = In x 6. y = x - x y = 2x x =y-8 y = 0, y = 2