(a) What are the weaknesses of the standard forecasting techniques as applied to this set of data?..

(a) What are the weaknesses of the standard forecasting techniques as applied to this set of data?
(b) Because known models are not appropriate here, propose your own approach to forecasting. Although there is no perfect solution to tackling data such as these (in other words, there are no 100 right or wrong answers), justify your model.
(c) Forecast demand for each month next year using the model youpropose.