Assume that the number of periods is 10, and we want a weighted moving average of four stock prices of P4 = $70, P3 = $66, P2= $68, and P1=$69, Where Pn represents the period Given the following weightings W1 =4/10 ; W2 = 3/10 ; W3 = 2/10 ; W4 = 1/10, calculate the Weighted Average for the four prices (in your calculation show all the formulas and your working). (10 marks) b) Give a brief explanation of the following terms:

i. Service Profit Chain (5 marks)

ii. Process Value