7.A projectile is fired from the origin (at y = 0 m) as shown in the diagram. The initial velocity components are V0x = 210 m/s and V0y = 82 m/s. The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q, which is 20 m below the launch point. What is the vertical component of the velocity ( V_{y}) of the projectile at point P?