Hui Ying received an invoice dated 23 July 2022 with the amount of RM 4,800 including a transportation cost of RM 200. The trade discounts given were 10% and 7% and the cash discount terms were 5/10, 2/18, and n/30. Find a) the single discount rate that is equivalent to the series of trade discounts given. b) the last date to receive a 2% cash discount. c) the amount to be paid if she made a payment on 29th July 2022.