$1.[10]$ Consider the following description of an ADT that we will call a "SmartDictionary". Objects: A collection S of word objects, each object x in S has x$.$ word being the word itself $($a string$)$ and x$.$meanings being the list of meanings of the word $($a list of strings$).$ Operations: $-$ LookUp $($S$,$ w$)$: given a word st