An operation analyst is forecasting this year's demand for one of his company's products based on the following historical data: (4 year ago Quantity sold was 1092). (3 year ago Quantity sold was 1203 ). (2 year ago Quantity sold was 1717 ) and the last year Quantity sold was 1910. The previous trend line had predicted 1215 for three years ago, 1280 for two years ago and 1345 for last year. What was the mean squared error (MSE) for these forecasts? O a. 170112.67 Ob. 338 Oc: 18.68 od 0.19 The Dean of a faculty wants to forecast student enrolments for this academic year based on the following historical data: (5 years ago enrolment was 12181), (4 years ago enrolment was 15930), (3 years ago enrolment was 16292), (2 years ago enrolment was 16648 ) and in the last year enrolment was 19953 . What is the forecast for this year using exponential smoothing with alpha=0.72000003 , if the forecast for two years ago was 16806 O a 16692.24 O b. 19039.988 Oc. 19027.6 Od 17866.113 The president of the Southern University wants to forecast student enrolments for this academic year based on the following historical data: (5 years ago enrolment was 10243 ), (4 years ago enrolment was 10496), (3 years ago enrolment was 11583 ). (2 years ago enrolment was 15531 ) and in the last year enrolment was 19428. What is the forecast for this year using three periods simple moving average? O a. 13456.2 Ob. 10774 Oc15514 Od 12536.667