Assignment 18 - Page 2 of 10 - 4. Construct the table obtained by applying the join operator J2 to the relations in Table 6 and Table 7. 5. Represent each of these relations on A={1,2,3,4} with a matrix. You may assume an increasing order for each element of the A from the top left corner of the matrix. (a) {(1,2),(1,3),(1,4),(2,3),(2,4),(3,4)} (5pts) (b) {(1,1),(1,4),(2,2),(3,3),(4,1)} (5pts) (c) {(1,2),(1,3),(1,4),(2,1),(2,3),(2,4),(3,1),(3,4),(4,1),(4,2),(4,3)} (5pts) (d) {(2,4),(3,1),(3,2),(3,4)} (5 pts)