You should use the following operations in r elational algebra: ap(R) TA.. .A(R)Projection onto the set of attributes (A,An Selection by condition (R)Renaming the relation name to R and attribute names to A1,... , A,n PR' (R) P(A AR) Renaming the attribute names to Ai,..,An R1 U R2 Rin R2 R1 R2 Renaming the relation name to R Union of two relations R1 and R2 Intersection of two relations R1 and R2 Difference of two relations R1 and R2 Cartesian product of two relations R1 and R2 Join of two relations R1 and R2 with the join condition Natural join of two relations R and Ri condition pi AND condition p2 condition pi OR condition p2