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2. In an inverted index over 0.5 million documents, the following term-frequency statistics were observed: Recommend a query processing order for the following queries: (i) (tangerine OR trees) AND (marmalade OR skies) AND (kaleidoscope OR eyes) (ii) tangerine AND (NOT marmalade) AND (NOT trees) /4 Hint: for a term t, NOT t has an associated estimated frequency of N - frequency t, where N is the total number of documents. 3. For a conjunctive query, is processing postings lists in order of size guaranteed to be optimal? Explain why it is, or give an example where it is not