16. In the Rocchio query modification formula what is the role of qm=q+NrdjDrdjNndjDndj A. Weight of the original query B. Importance of relevant documents C. Significance of non-relevant documents D. Normalization factor for the document vectors E. A Denominator of the collection documents 17. If the original query vector is (1,0,2) and the average vector of relevant documents is (2,1,3), what is the updated query vector using the Rocchio algorithm with =1 and =0.5 A. (2,0.5,3.5) B. (1.5,0.5,2.5) C. (2.5,0.5,3.5) D. (1,1,2.5) E. (1,2,1.5)