) Each subset is non-empty</label></li>
                <li><label><input type="radio" name="q0" value="3"> d) Each subset contains an equal number of points</label></li>
            </ul>
            <div class="feedback" id="feedback0"></div>
        </div>

        <div class="question">
            <p>In the \( k \)-means objective function, what does the variable \( \boldsymbol{\mu}_i \) represent?</p>
            <ul class="options">
                <li><label><input type="radio" name="q1" value="0"> 