Let XXX have the PDF f(x)=12xf(x) = \frac{1}{2}xf(x)=21x for 0≤x≤20 \le x \le 20≤x≤2. What is the variance of Y=X2Y = X^2Y=X2?
1.21.21.2
1.61.61.6
2.42.42.4
0.80.80.8