If a random variable x has the probability distribution then P (3<x ≤ 6) is equal to

If a random variable $\displaystyle x$ has the probability distribution

$\displaystyle x$	$\displaystyle 0$	$\displaystyle 1$	$\displaystyle 2$	$\displaystyle 3$	$\displaystyle 4$	$\displaystyle 5$	$\displaystyle 6$	$\displaystyle 7$
$\displaystyle \mathrm{P}(x)$	$\displaystyle 0$	2k	k	3k	$\displaystyle 2 \mathrm{k}^2$	2k	$\displaystyle \mathrm{k}^2+\mathrm{k}$	$\displaystyle 7 \mathrm{k}^2$

then $\displaystyle \mathrm{P}(3<x \leq 6)$ is equal to