In the diagram above, the leaf node with $00500060$ is full, as is the parent node $00400050.$ Other

nodes are not full because they contain only one key value and two pointer values. The leaf nodes

also contain pointers to the table rows in the table file but these are not shown in the diagram.

$1.$ The leaf node $[0040]$ shows only one pointer. Where is the second pointer?$2.$ Give an example of an SQL select that is a range query?