Consider the execution of the following while loop

$)<mi\; id="EditorElement\_1570591">(</mi><mn\; id="EditorElement\_1570585">5</mn>$

$\{$

cout $x+1$ endl;

increment;

$\}$

If the last value printed is $5,$ which of the following might have been used for increment?

$++x$

$x++$;

All of them

$x+=1$