Solve the all parts of given question:
Question: A 5.43-kg ball hangs from the top of a vertical pole by a 2.21-m-long string. The ball is struck, causing it to revolve around the pole at a speed of 4.45 m/s in a horizontal circle with the string remaining taut.
Part A: Calculate the angle, between 0° and 90° that the string makes with the pole.
Part B: Take g = 9. Then Find the tension of the string
Please show all intermediate steps and formulas.