a (ROS) c ::= 3beB. (aSb) A(bRc). In other words, a is related to c in R o S if starting at a you can follow an S arrow to the start of an R arrow and then follow the R arrow to get to c. Here is one worked example to get you started: - Search description: The set of pages containing the word "logic" - Solution expression: M ("logic") Find similar solutions for each of the following searches: (a) The set of pages containing the word "logic" but not the word "predicate" (b) The set of pages containing the word "set" that have been recommended by "Wiggins" (c) The set of endorsers who have recommended pages containing the words "discrete" and "mathematics" (d) The relation that relates endorser e and word wiff e has recommended a page containing W (e) The set of pages that have at least one incoming or outgoing link (f) The relation that relates word w and page p iff w appears on a page that links to p (g) The relation that relates word w and endorser e iff w appears on a page that links to a page that e recommends (h) The relation that relates pages p, and p2 iff p2 can be reached from p, by following a sequence of exactly 4 links