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$x$	$5$	$6$	$7$	$8$	$9$
$P(x)$	$0.2$	$0.1$	$0.2$	$0.1$	$0.4$

Given the discrete probability distribution above, determine the following:

(a) $P(5\le x <7)$ $=$

(b) $P(x\le 8)$ $=$

(c) $P(x>6)$ $=$

You can earn partial credit on this problem.