Let $T_1$ and $T_2$ be two distinct common tangents to the ellipse $E: \frac{x^2}{6}+\frac{y^2}{3}=1$ and the parabola $P: y^2=12 x$. Suppose that the tangent $T_1$ touches $P$ and $E_{\text {at }}$ the points $A_1$ and $A_2$, respectively and the tangent $T_2$ touches $P$ and $E_{\text {at }}$ the points $A_4$ and $A_3$, respectively. Then which of the following statements is (are) true?