Question: A book could be written by a single author or multiple authors. Consider the organization of a dictionary, for example, what should be used as

A book could be written by a single author or multiple authors. Consider the organization of a dictionary, for example, what should be used as the key in the dictionary?

(a) What should the organization of the dictionary be, if we want to find the names of all the books written by a given author?

(b) What should the organization of the dictionary be, if we want to find the names of all the authors of a given book?

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