Another way to handle deletion from hash tables for names whose scope has been passed (as in Section 7.6) is to leave expired names on a list until that list is again searched. Assumingentries include the name of the procedure in which the declaration is made. we can in principle tell whether a name is old, and delete it if so. Give an indexing scheme for procedures that enables us to tell in 0 ( I) time whether a procedure is "old," i.e., its scope has been passed.