Given f(x,y)=1f(x, y) = 1f(x,y)=1 for 0≤x≤1,0≤y≤10 \le x \le 1, 0 \le y \le 10≤x≤1,0≤y≤1. What is P(Y<X/2)P(Y < X/2)P(Y<X/2)?
0.5
0.25
0.125
0.1