Given the following relations R and S. where R(A. B. C) = ((x, y, z): G. g. s): (y, x. g): (g. w. e)) and S (B. C. D) = ((g, s. r); (y, x, g) (n q, e)) compute the following operations: 1. Cartesian product: R S 2. Natural join: R d:s 3. Equal join: R DdRB-SB S