A ball is attached to a rope of length 1.60 m and swung in a vertical circle, so that its speed is varying over time. At the time that the ball is at r = - 1.60 mi in a coordinate system with the centre of the circle at the origin, the acceleration vector is a = (22.5i - 20.21j)m/s^2. Assuming the ball is being swung in a counterclockwise direction, what are the velocity and tangential acceleration of the ball at this time, in component form