An ice-hockey puck slides with an initial velocity $\vec{u} = (3\hat{i} + 4\hat{j})\ \text{m/s}$. A steady wind gives it a constant acceleration $\vec{a} = (2\hat{i} - \hat{j})\ \text{m/s}^2$. Its speed after $2.0\ \text{s}$ is about