Sketch the following region R and write an iterated integral of a continuous function f over the region. Use the order dy dx. R is the triangular region with vertices (0,0), (0,4), and (1,0). Sketch the region R. Choose the correct graph below. O A. O B. O C. OD. 10 Ay X X Write an iterated integral of a continuous function f over the region R. Use the order dy dx. f ( x y ) dy dx