Packing Pentominoes

Logic Level 1

Can you cover this $5\times5$ grid perfectly using only $x$ and $b$ pentominoes?

You may rotate, flip, and move the pieces.
You may not cut the pieces.
You may use any number of $x$ 's and any number of $b$ 's.
You may not overlap the pieces.
All pieces you use must be placed entirely on the grid.