Circle Q is shown. Secant L N and tangent P N intersect at point N outside of the circle. Secant L N intersects the circle at point M. Arc M P is y, arc L P is x, and arc M L is z. Which equation is correct regarding the measure of ∠MNP? m∠MNP = One-half(x – y) m∠MNP = One-half(x + y) m∠MNP = One-half(z + y) m∠MNP = One-half(z – y)