Majority of  candidates were able to differentiate cash discount and trade discount.  But they did not do well on part (b) and (c)  of the question.  The required responses  to the question are:
                    -           Means of payment by commercial bank  are
                                -           cash,  standing order, credit transfer, bank-draft, etc.
                    The means of  payment on international trade are:
                    -           bill of exchange, letter of credit,  e-payment, etc.