Below try to find the volume, if you can't just leave it.
[table][tr][td]Input[/td][td]0[/td][td]2[/td][td]4[/td][td]6[/td][td]8[/td][td]10[/td][/tr][tr][td]Output[/td][td][/td][td][/td][td][/td][td][/td][td][/td][td][/td][/tr][/table]Fill out the output by this rule; divide by 4 then add by 2.[br]