Need help please

a. Prepare a three week moving average forecast for Week 4 b. If the actual \# of patient arrivals in week 4 is 415 , what is the forecast error for week 4 . c. What is the forecast for week 5 using three week moving average? (Use week 4 Actual in Part b) d. Prepare a weighted moving average forecast for Week 7 (using .50, .30, .20) e. If the actual \# of patient arrivals in week 7 is 415 , what is the forecast error for week 7 . f. What is the forecast for week 8 using weighted moving average? (Use week 7 actual in Part e)