Wendy throws a dart at this square-shaped target:

A square is shown with sides labeled 10. A shaded circle is shown in the center of the square. The diameter of the circle is 2.

Part A: Is the probability of hitting the black circle inside the target closer to 0 or 1? Explain your answer and show your work.
Part B: Is the probability of hitting the white portion of the target closer to 0 or 1? Explain your answer and show your work.