If $x$ is a binomial random variable, compute $P(x)$ for each of the following cases:

(a) $P(x\leq 2) , n = 4 , p = 0.2$

$P(x) =$

(b) $P(x> 7) , n = 8 , p = 0.5$

$P(x) =$

(c) $P(x< 3) , n = 4 , p = 0.4$

$P(x) =$

(d) $P(x\geq 3) , n = 7 , p = 0.7$

$P(x) =$