Part I:

Write out the left child, right child, parent, and leaves arrays
for this tree:

                   8
                  / \
                 /   \
                7     \
               / \     \
              5   \     6
             / \   \   / \
            0   1   2 3   4

--------------------------
Part II:

Construct the UPGMA tree for the matrix below and write out the
left and right child, parent, and leaves arrays.

  0  1  2  3
0 0  2  6  12
1 2  0  6  12
2 6  6  0  12
3 12 12 12 0

Submit a hardcopy on Mar 22nd in class.