Do the naive method and linear trend equation for MAD, please try to do on paper or easy to undertand

20. An analyst must decide between two different forecasting techniques for weekly sales of roller blades: a linear trend equation and the naive approach. The linear trend equation is s = 124 + 21, and it was developed using data from periods 1 through 10. Based on data for periods 11 through 20 as shown in the table, which of these two methods has the greater accuracy if MAD and MSE are used? 1 Units Sold 11 147 12 148 13 151 14 145 15 155 16 152 17 155 18 157 19 160 20 165