Could someone help me solve this without using an excel file? I'm having trouble with the calculations

Forecasting Handout The manager of the Cleaning Solutions carpet cleaning company needs a quarterly forecast of the number of customers expected next year. The carpet cleaning business is seasonal, as past 4 years' demand data shown below. Quarter Year 1 Year 2 Year 3 100 70 45 335 520 585 Year 4 100 725 1160 215 2200 370 590 170 1200 Compare the results with those in a 2-year weighted moving average, with weights of 0.8 one period ago, and 0.2 two periods ago. 4. Use exponential smoothing, first with a smoothing constant of 0.2 and then with one of 0.9, to develop forecasts for demand in each quarter through years 2 to 5, assuming Fl=A1. 5. Calculate MAD and TS for exponential smoothing method, with constant 0.9, for each quarter through years 2 to 5, assuming Fl=A1. 6. Use simple linear regression to forecast demand in each quarter of Year 5 (Find a linear regression model for each quarter). 100 830 285 1800 Yearly Total 1000 Demand 1500 1000 End of document I 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1. Use the Nave forecasting method to forecast demand in each quarter of Year 5. 2. Use a 2-year moving average to forecast demand in each quarter of Year 5. Compare the results with those from a 3- year and 4-year moving average. 3. Using 3-year weighted moving average method, with weights of 0.6 one period ago, 0.3 two periods ago, and 0.1 three periods ago, to forecast demand in each quarter of Year 5