Find the Expected Value and Variance for the Random Variable $f ( x ) = 4 x - 1$

Short Answer

Find the expected value and variance for the random variable whose probability density function is $f ( x ) = 4 x - 1$ $\frac { 1 } { 2 }$ ≤ x ≤ 1.
Enter just two reduced fractions (unlabeled) in the order E(X), Var(X) separated by a comma.