The mean and standard deviation of a random variable $x$ are $-7$ and $3$ respectively. Find the mean and standard deviation of the given random variables:

(1) $\ y = x + 2$
$\mu =$
$\sigma =$

(2) $\ v = 8 x$
$\mu =$
$\sigma =$

(3) $\ w = 8 x + 2$
$\mu =$
$\sigma =$