The reaction $2A+B⟶C+D$ goes to completion and follows the rate law $-\frac{d\left[B\right]}{dt}=K\left[A{]}^2\right[B]$ Calculate the values of (x + y) in the following data:

Set	$\left[A_0\right]\times {10}^{-3}\mathrm{M}$	$\left[B_0\right]\times {10}^{-3}\mathrm{M}$	Half life (sec)
1	300	4	300
2	300	6	x
3	5	300	625
4	10	300	y