The monthly sales for Telco Batteries Inc., were as follows: Month Sales 1 9 2 7 3 10 4 8 5 7 6 12 7 10 8 11 9 12 10 10 11 14 12 16 a) Compute a five and a seven month moving average for the last 5 months of historical data (months 8 thru 12). b) Determine which of these forecasts are more accurate using the concept of MAD.