Please solve

3. (7 marks) Provide a definition for a predicate cousin (X,Y ) with the meaning X is a (first) cousin of Y, based solely on the parent predicate. Then, use your definition together with the parent clauses below, order to draw the Prolog execution tree (showing the substitutions made in each unification and the backtracking steps) for the query: ?- cousin(ann, X). parent(pam, bob). parent(tom, bob). parent(tom, liz). parent(bob, ann). parent(bob, pat). parent(liz, jim). parent(liz, evan). Vousin (x,y)=parent(P1,x), Parent (P2,y), Parant (z, Parent (z1P2)