Let $\vec{a}=2 \hat{i}+\lambda_1 \hat{j}+3 \hat{k}, \vec{b}=4 \hat{i}+\left(3-\lambda_2\right) \hat{j}+6 \hat{k}$ and $\vec{c}=3 \hat{i}+6 \hat{j}+\left(\lambda_3-1\right) \hat{k}$ be three vectors such that $\vec{b}=2 \vec{a}$ and $\vec{a}$ is perpendicular to $\vec{c}$. Then a possible value of $\left(\lambda_1, \lambda_2, \lambda_3\right)$ is :