A random point (X, Y) is distributed uniformly on the square with vertices (1, 1), (1,-1), (-1,1),

Question:

A random point (X, Y) is distributed uniformly on the square with vertices (1, 1), (1,-1), (-1,1), and (-1,-1). That is, the joint pdf is /(x, y) = 1/4 on the square. Determine the probabilities of the following events.
(a) X2 + Y2 < 1
(b) 2X - Y > 0
(c) |X + Y| < 2