Chemical Kinetics

For the reaction \(2 \mathrm{~A}+2 \mathrm{~B} \rightarrow 2 \mathrm{C}+\mathrm{D}\) if \(\mathrm{r}=\mathrm{k}[\mathrm{A}]^2[\mathrm{~B}]^0\), then rate of reaction is