b) Let Q={q1;:::;q5} be a set of queries, A={A1;:::;A5} be a set of attributes, and S={S1;S2;S3} be a set of sites. The matrix of Figure (3a) describes the attribute usage values and the matrix of Figure ( 3b) gives the application access frequencies. Suppose attribute A1, A2 is already placed in clustered affinity matrix. Now calculate the clustered affinity matrix for placing attribute A4. (a) (b)