Solve the all parts of given problem:
Problem: The star Rho1 Cancri is 57 light-years from the earth and has a mass 0.85 times that of our sun. A planet has been detected in a circular orbit around Rho1 Cancri with an orbital radius equal to 0.11 times the radius of the earth's orbit around the sun.
Part A: What is the orbital speed of the planet of Rho1 Cancri?
Part B: What is the orbital period of the planet of Rho1 Cancri?
I want help to determine the orbital speed of the planet of Rho1 Cancri.