For a chemical reaction A + B → Product, the order is 1 with respect to A and B. What is the value of x and y?

For a chemical reaction $\displaystyle \mathrm{A}+\mathrm{B} \rightarrow$ Product, the order is $\displaystyle 1$ with respect to A and B .

Rate $\displaystyle \mathrm{mol} \mathrm{L}^{-1} \mathrm{~S}^{-1}$	[A] $\displaystyle \mathrm{mol} \mathrm{L}^{-1}$	[B] $\displaystyle \mathrm{mol} \mathrm{L}^{-1}$
$\displaystyle 0.10$	$\displaystyle 20$	$\displaystyle 0.5$
$\displaystyle 0.40$	$\displaystyle x$	$\displaystyle 0.5$
$\displaystyle 0.80$	$\displaystyle 40$	$\displaystyle y$

What is the value of $\displaystyle x$ and $\displaystyle y$ ?