Question $5(9$ points$)$

Demand for a product and the forecasting department's forecast $($nal$$ve model$)$ for a product are shown below. Compute the mean absolute percentage error $($MAPE$).$

A

Use $2$ decimals, not percentage

$\backslash$table$[[$Per$,$Y$,$Forecast$],[1,12,,],[2,15,12,],[3,20,15,],[4,15,20,],[5,19,15,],[6,,19,]]$