Short Answer $(10$ marks$)$

Using the data given complete the forecasts using the following $3$ methods

For each calculate the mean absolute deviation $($MAD$)$

What forecast method is best, why?

$2$ months

$\backslash$table$[[$Month$,$Pizzas,Forecast,$\backslash$table$[[$Absolute$],[$value of$],[$error$]]],[1,230,,],[2,240,,],[3,260,235,25],[4,320,250,70],[5,320,290,30],[6,350,320,30],[7,,335,],[,,,],[$sum of errors,$155,,],[$MAD$,38\mathrm{.}25,,]]$