Need help everything comes out with wrong , need answers with explanation please

Burger Lover Restaurant forecasts weekly sales of cheeseburgers. Cheeseburger Sales Week 1 2 3 4 357 341 363 315 355 Based on historical observations over the past five weeks, make a forecast for the next period using the following methods: simple average, three-period moving average, and exponential smoothing with a = 0.5. given a forecast of 324 cheeseburgers for the first week. (Round your answers to 2 decimal places.e.g. 250.25) Simple average: F- 335.00 3-Period moving average: Fs = 344.33 Exponential smoothing: Fs= 344.22 If actual sales for week 6 turn out to be 372.compare the three forecasts using MAD. Which method performed best? (Calculate your answers using the error only in period 6.) MAD (simple average) = 26.00 MAD (3-period moving average) = 27.22 MAD (exponential smoothing) = 23.66 3-Perlod moving average provides the lowest MAD