PLEASE DO ANSWER QA AND QB...

Dinar Berhad is located in Bayan Lepas where a market is held regularly. It decided to buy a bus to take passengers to and from the market. It is estimated that 200 tickets could be sold a day for RM4 each. Dinar Berhad intended to run the bus for three years. It had the option of buying a newer bus, bus A, or an older bus, bus B. Dinar Berhad knew that the older bus would be less reliable and there would be more days each year when the bus could not run because of breakdowns and maintenance. It would also require more money to be spent on repairs. The followine estimated information was available. Other running costs were expected to the same for both buses, Dinar Berhad uses a cost of eapital of 10%. a) Calculate the difference in NPV between purehasing bus A and bus B