The table below shows the total quarterly fee income for your bank in your country for the last three years. ($000) Q 1 Q 2 Q 3 Q 4 Year 2014 200 260 285 450 Year 2015 280 315 333 492 Year 2016 329 375 406 521 a) Calculate a four-quarter moving average to identify the trend of the fee income for the three year period. b) Calculate the seasonal factors and use these to seasonally adjust the original fee income data. c) Plot both the original fee income data and the seasonally adjusted data obtained in question (1.b) above on a single graph sheet.