Use set-builder notation to write the following set.

{3, 6, 9}

{x | x is a multiple of 3 and 3 < x < 9}

{x | x is a multiple of 2 and 3 < x < 9}

none of these

{x | x is a multiple of 2 and 2 < x < 10}

{x | x is a multiple of 3 and 2 < x < 10}