Figure 1

a.
Enter Action Code (? for help): c

   There are 7 nodes

Enter Action Code (? for help): f

   Tree depth is 3

Enter Action Code (? for help): p

      1 black      L: -          R: -
      2 blue       L: black      R: brown
      3 brown      L: -          R: -
      4 green      L: blue       R: red
      5 orange     L: -          R: -
      6 red        L: orange     R: white
      7 white      L: -          R: -

b.
           green                 (1)
         /       \
    blue          red            (2)
   /    \        /   \
black  brown orange white        (3)