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 = 4 in 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)