please answer all parts

h) The foilowlng table shows the number of customers registered for RGH swimming classes from the year 2016 to 201 B. i) Find the trend values for the number of customers registered for RGH swimming olassas using the moving average method (correct to two decimal places). (5 marks) ii) Determine the seasonal index for each quarter. (6 marks) iii) Interpret the seasonal indices obtained for the third and fourth quarter. (2 marks) iv) Forecast the number of customers registered in the third quarter of 2019. {3 marks)