Let \(X\) be a random variable having probability density function

\[
f(x)=2 x \text { for } \quad 0 \quad x \quad 1
\]

(a) Find \(P\left(\begin{array}{ll}X \quad 75\end{array}\right)\).

(b) Find \(P\left(\begin{array}{lll}25 & X & 6\end{array}\right)\).