4 A Given the set A 1 2 3 4 and relations R defined on set A as follows R 1 1 1 2 2 1 2 2 3 3 4 4 i Represent the relation R in a directed graph ii By explaining from the directed graph Is the relation R reflexive Symmetric Asymmetric Transitive Equivalence B Solve the following recurrence relations using an appropriate method for each i Un Un 1 n with Uo 3 ii Un 7Un 1 1 with U 1 iii Un 3Un 1 4Un 2 with Uo 2 and U 3 20 Marks