2). A phrase query "wordl word2" retrieves documents where wordl is immediately followed by word2, A /k query "wordl /k word2" (k is a positive integer) retrieves documents where wordl occurs within k words of word2 on either side. For example, k-1 demands that wordl be adjacent to word2, but wordl may come either before or after word2. For the following queries, return all the docs and corresponding positions (phrase starting positions) for which the query conditions are met. If no document meets the criteria, return none. "mind matter" "matter mind" "you /4 you" "mind /3 matter" 2). A phrase query "wordl word2" retrieves documents where wordl is immediately followed by word2, A /k query "wordl /k word2" (k is a positive integer) retrieves documents where wordl occurs within k words of word2 on either side. For example, k-1 demands that wordl be adjacent to word2, but wordl may come either before or after word2. For the following queries, return all the docs and corresponding positions (phrase starting positions) for which the query conditions are met. If no document meets the criteria, return none. "mind matter" "matter mind" "you /4 you" "mind /3 matter