The quarterly Sales in for the last Units for two years atc Quarter Year I as follows!. Year 2 The Sporting Company" 825 863 820 940 919 938 831 870 was fitted to the Using linear regression, a straight line Sales Data. Assume that the equation of the fitted is Y= 800 + 15xt. The first quarter in data is line the a) Calculate the fitted labelled = 1. Seasonal indexes for this line using line approach b) using the fitted line have just calculated and Jeasonal indexes you forecast sales in each quarter of Year 3 You may provide your answers In either a table or Written form