 = "Right! You have to worsen the convergence or make a stop criteria more strict. Moving the starting point also helps to fine tune the setup.";
        document.getElementById("buttons_quest_6").style.display = 'none';
        quests[5] = 1;
    } else {
        document.getElementById("reply_quest_6").innerHTML = "That's not exactly 58 iterations.";
    }
}

function done_system_4_quest_7() {
    if(last_error >= 6.0) {
        document.getElementById("reply_quest_7").innerHTML = "Of course! The error do