The orbital speed of a planet about its star is 31times 104

Question

Solve the all parts of given problem:

Problem: The orbital speed of a planet about its star is 3.1× 104 m/s and its distance from the star is 1.6× 10¹¹ m. The mass of the planet is approximately 6.0× 10²⁴ kg.

Part A: What is the magnitude of the force exerted by the star on the planet?

Part B: What is the mass of the star?

I need help to determine the magnitude of the force exerted by the star on the planet.