Quadrilateral OPQR is inscribed in circle N, as shown below. Which of the following could be used to calculate the measure of ∠ OPQ?(6 points) Circle N is shown with a quadrilateral OPQR inscribed inside it. Angle O is labeled x plus 16. Angle P is not labeled. Angle Q

m∠ OPQ + (2x + 16)° = 180°

m∠ OPQ = (6x − 4)° + (2x + 16)°

m∠ OPQ + (x + 16)° + (6x − 4)°= 360°

m∠ OPQ = (x + 16)° + (6x − 4)°