Bad Problem $4$

$\backslash$table$[[$Forecasting Method A$],[Q,$Actual,Forecast$],[1,150,000,150,000],[2,160,000,110,000],[3,130,000,142,038],[4,120,000,138,169],[5,140,000,134,894],[6,144,000,133,704],[7,157,000,134,632],[8,137,000,135,585],[9,110,000,133,446],[10,117,000,124,362],[11,120,000,120,259],[12,140,000,132,457]]$

$\backslash$table$[[$Forecasting Method B$],[$Q$,$Actual,Forecast$],[1,150,000,150,000],[2,160,000,140,000],[3,130,000,141,038],[4,120,000,137,169],[5,140,000,133,894],[6,144,000,132,704],[7,157,000,133,632],[8,137,000,134,585],[9,110,000,132,446],[10,117,000,125,362],[11,120,000,119,259],[12,118,000,119,259]]$

$\backslash$table$[[$Forecasting Method C$],[Q,$Actual,Forecast$],[1,150,000,150,000],[2,160,000,160,000],[3,130,000,130,000],[4,120,000,120,000],[5,140,000,140,000],[6,144,000,144,000],[7,157,000,157,000],[8,137,000,137,000],[9,110,000,110,000],[10,117,000,117,000],[11,120,000,120,000],[12,140,000,140,000]]$

a$)$ What is the MAD value of the forecast A $?$

b$)$ What is the MAD value of the forecast B $?$

c$)$ What is the MAD value of the forecast C$?$

d$)$ Which forecast method is more accurate?