Find parametric equations for the path of a particle that moves along the circle x2 + (y

Question:

Find parametric equations for the path of a particle that moves along the circle x2 + (y - 1)2 = 4in the manner described.
(a) Once around clockwise, starting at (2,1)
(b) Three times around counterclockwise, starting at (2,1)
(c) Halfway around counterclockwise, starting at (0,3)