<?php

$lukujono = $_GET['lukujono']; // Can't touch this line
$lukutaulukko = explode(',',$lukujono); // Can't touch this line

$pisteet = $lukujono;
$summa = array_sum($lukutaulukko);
$keskiarvo = ($summa/count($lukutaulukko));


echo "Pisteet olivat: $pisteetn"; // Can't touch this line
echo "Pisteiden summa: $summan"; // Can't touch this line
echo "Pisteiden keskiarvo: $keskiarvo"; // Can't touch this line
?>