A.3 (a) Four friends Ali, Ahmed, Mohammed and Salim started a new part-time business. They decided to share the profits in the ratio of the number of hours that each worked. During the first month, Ali worked 20 hours, Ahmed 10 hours, Mohammed 40 hours and Salim 30 hours. Express in the lowest terms the ratio of the time that they worked during the first month. [1.5 Mark] m) Ali, Ahmed, Mohammed and Salim share their first month profit OMR 6000 in the ratio of 2:1:4:3. How much money does Ali, Ahmed and Mohammed receive? (1.5 Mark]