18. Given two relations R2.)3) and R, -(x.b).(v.b).^v.a)(v.e) with orderings 1,2,3;x.y;abc Answering the following questions. a. Find the matrix A, of relation R relative to the orderings. b. Find the matrix A2 of relation R2 relative to the orderings. C. Find the matrix product AA d. Use the result of part c to find the matrix of the relation R2oR