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) 18. Which of the following is a query modification algorithm - Standard Rocchio - Ide-Regular - Ide-Dec-Hi - Probabilistic Method - All of the above 19. What is the primary benefit of using the Mean Average Precision (MAP) metric? A. It accounts for the order in which the relevant documents are retrieved. B. It simplifies the evaluation by ignoring the rank of documents. C. It measures the number of non-relevant documents retrieved. D. It only considers the first relevant document retrieved. E. It considers total document collection