Let Ram, Kabita and Einstina be the members of Ram's family denoted by a set A where Ram is the husband of Kabita; and Einstina is their daughter. Construct a Cartesian product A x A and hence find the relations (a) R₁ defined by 'is daughter of (b) R₂ defined by 'is father of (c) R3 defined by 'is wife of" (d) R4 defined by 'is husband of".​