Consider the parabola \( y^2=4x \). Let \( S \) be the focus of the parabola. A pair of tangents drawn to the parabola from the point \( P=(-2,1) \) meet the parabola at \( P_1 \) and \( P_2 \). Let \( Q_1 \) and \( Q_2 \) be points on the lines \( SP_1 \) and \( SP_2 \) respectively such that \( PQ_1 \) is perpendicular to \( SP_1 \) and \( PQ_2 \) is perpendicular to \( SP_2 \). Then, which of the following is/are TRUE?
