Arab plc has four operating segments. The following information relates to the year ending 31 March 2020: External Profit/(loss) Assets Revenue 000 000 000 Segment P 27,300 2,450 14,540 Segment Q 36.100 3,150 16,490 Segment R 6,200 (230) 3,170 Segment S 7,800 (550) 3,800 In addition to the external revenue shown above, Segment P earned revenue of 4.6m from sales to other operating segments. Identify the company's reportable segments for the year to 31 March 2020 in accordance with the requirements of IFRSS and explain briefly the reasons for your answer.