please show work

8. Given the Actual Unit Sales by product below for 2020 Q1 answer the following questions. HINT: The PVB Products are all the products in the PVB Product Family and the Fire Valve products are all the products in tiffe Fire Valve Product Family. Calculate the MAD and MAPE for each of the forecasts you calculated in Questions 4-7. SHOW YOUR WORK, ROUND ANSWERS 2 DECIMAL PLACES (32pts) Refer to the results of question 8 to answer questions 9-11. 9. You have calculated MAD and MAPE for each forecast method (questions 4-7). Which of the forecasting methods appears most accurate for the PVB Product Family and why? (5 Rt) 10. You have calculated MAD and MAPE for each forecast method (questions 4-7). Which of the forecasting methods appears most accurate for the Fire Valve Product Family and why? (5 Rts) 11. Consider the forecast methods you identified as most accurate in parts b. and c. above. Which product family (PVB or Fire Valve) has the most accurate forecast and why? (5 pts) HINT: Compare the forecast accuracy of the PVB Product Family to the accuracy of the Fire Valve Product Family. 12. The General Manager anticipates high growth in the Fire Valve market since Beamers is introducing several new product extensions designed to increase market share. Beamers is introducing a Fixed Setting Valve to respond to some regulatory agencles now requiring fixed setting values over adjustable setting valves. Fixed setting values have been around for a few years, but Beamers has never sold them. What forecasting method(s) do you recommend Beamers adopt to forecast sales demand of the new "Fixed" fire valves and why? (5 pts)