Here are the solutions to the exercises: <?php echo "Hello, John."; echo "<br>"; echo "I'm learning PHP"; echo "<br>"; echo "Twinkle, Twinkle little star."; $around = "around"; echo "<br>"; echo "What goes $around, comes $around."; ?> <?php $x=10; $y=5; echo $x." + ".$y." = ".($x+$y)."<br>"; echo $x." - ".$y." = ".($x-$y)."<br>"; echo $x." * ".$y." = ".($x*