Let $E$ denote the parabola $y^2=8 x$. Let $P=(-2,4)$, and let $Q$ and $Q^{\prime}$ be two distinct points on $E$ such that the lines PQ and $\mathrm{PQ}^{\prime}$ are tangents to E . Let F be the focus of E . Then which of the following statements is (are) TRUE?
