Using the data shown below in Table $1,$ compute the mean square error, mean absolute deviation, and mean absolute percentage error for the forecasts shown and then answer the following question.

Table $1$

Month

Forecast Demand

Actual Demand

April

$170$

$180$

May

$225$

$200$

June

$210$

$200$

July

$260$

$240$

August

$200$

$230$

The mean absolute deviation $($MAD$)$ is:

Question $10$ options:

less than or equal to $20.$

more than $20$ but less than or equal to $30.$

more than $30$ but less than or equal to $40.$

more than $40$ but less than or equal to $50.$