What is the value of $x$ after each of the following statements is encountered in a computer program, if $x=7$ before each statement is reached?

$($a$)$ if $x<mn\; id="EditorElement\_5619109">2</mn>$ then $x$:$=x+1$

$($b$)$ if $)=(3$ OR $)>(x$ then $x$:$=x+1$

$($c$)$ if $)=(5$ AND $)=(7$ then $x$:$=x+1$

$($d$)$ if $)=(2)=(4$ then $x$:$=x+1.$