13. Amana was paid an initial salary of Ksh. 180 000 per annum with a fixed annual increment Bundi was paid an initial salary of Ksh 150 000 per annum with a 10% increment compounded annually. (a) Given that Amaya's annual salary in the 11" year was Ksh 288 000, determine: (i) his annual increament; (ii) the total amount of money Amaya earned during the 11 years. (b) Determine Bundi's monthly earnings, correct to the nearest shilling, during the eleventh year. (2 mark (2 mark (c) Determine, correct to the nearest shilling: (i) the total amount of money Bundi earned during the 11 years. (2 mark (ii) the difference between Bundi's and Amaya's average monthly earnings during the 11 years. (2 marks ​