Q2. RECALL-PRECISION CURVE Given a query Q and a collection of documents, an IR system returns in decreasing order of rank 12 documents d1, d2, .... d12, of which only 5 are judged relevant by the user. (The user does not get to see the whole corpus of documents to rate them.) Knowing that the 5-point precision-recall curve has the following points (1/5, 1/3) (2/5, 2/7) (3/5, 3/8) (4/5, 4/11) (5/5, 5/12) can you tell which of the 12 documents are the relevant ones? (This is a backwards reasoning problem.)