The sales taken in for tickets to an ice-skating rink is recorded on a quarterly basis, for a period of 8 quarters. 1 2 3 4 5 6 7 8 Quarter Sales (£) 7555 6695 5415 4150 7310 7015 5435 3885 (a) Describe any short term, seasonal or cyclical trends in the data. (b) Calculate the 3 period moving averages for the data. (c) Plot your moving averages on the graph below. (d) Make a prediction for the sales taken in for the following 2 quarters.