How to create Age brackets , Data coming from Bex Query.

Hi Experts ,

   I  am using the pie chart component to count  of people with  different ages. In this I need to display the Age as Age  brackets as legends and the count of people for each age  bracket in pie chart component.

The Data is coming from Bex query which having two objects : count , Age.

Age Brackets Are : Below 25, 25 to 35, 35 to 45 ,  45 to 55 , 55 and above.

How to create Age brackets  for the   Age object which coming from the bex query to display the  count of people in pie cahrt.

Please Help me.....

Thanks... in advance ..

With regards ,

Nikil