Based on the following data, complete empty cells of the table by using Exponential Smoothing method. Then, Forecast the value of Month 9 and compute the MSE index. ( a =0.1 and consider the forecast of first month equal to 20).

Month	Real observations	Forecast	Forecast error	Squared forecast error	MSE
1	23
2	41
3	19
4	33
5	26
6	25
7	39
8	29
9	-