math statplease explain and show workthoroughly so I understand. thank you. Suppose that \( f_{Y}(y) \) is a continuous and symmetric pdf, where symmetry is the property that \( f_{Y}(y)=f_{Y}(-y) \) for all y. Show that \( P(-a \leq Y \leq a)=2 F_{Y}(a)-1 \) 1 answer