Mechanics Direction of Acceleration

"A 2.0 kg ball swings in a vertical circle on the end of an 80cm long string. The tension in the string is 20N when its angle from the highest point on the circle is 30 deg a. What is the ball’s speed, when angle is 30 deg? b. What is the magnitude of the ball’s acceleration, when angle is 30 deg? c. What is the direction of the ball’s acceleration angle is 30 deg? Give the direction as an angle from the r-axis. "