Consider the discrete random variable $\displaystyle {X}$ given in the table below. Calculate the mean, variance, and standard deviation of $\displaystyle {X}$.

$\displaystyle {X}$	2	5	7	10	18
P($\displaystyle {X}$)	0.11	0.11	0.12	0.12	0.54

$\displaystyle \mu$ =
$\displaystyle \sigma^{{2}}$ =
$\displaystyle \sigma$ =


What is the expected value of $\displaystyle {X}$?