{m}{2}\|y - x\|^2 \), for all \( x, y \in \mathbb{R}^d \)</label></li>
                <li><label><input type="radio" name="q6" value="1"> b) \( f(y) \geq f(x) + \nabla f(x)^T(y - x) + \frac{m}{2}\|y - x\|^2 \), for all \( x, y \in \mathbb{R}^d \)</label></li>
                <li><label><input type="radio" name="q6" value="2"> c) \( f(y) \leq f(x) + \nabla f(x)^T(y - x) - \frac{m}{2}\|y - x\|^2 \), for all \( x, y \in \mathbb{R}^d \)</label></li>
                <li><label><input type="radio" name="q6" valu