Insert 21. Split: Left=[17,21], Middle=22, Right=[44,45]
<PRE>        <IMG SRC="Lecture10Fig7.gif"></PRE>
Insert 67. Split: Left=55,66], Middle=67, Right=[68,70]
<PRE>        <IMG SRC="Lecture10Fig8.gif"></PRE>
Overflow. Split: Left=[5,10], Middle=22, Right=[50,67]