A uniform ladder of mass \(M\) and length \(L\) rests against a frictionless vertical wall and makes an angle \(\theta\) with a rough horizontal floor. A person of mass \(m\) stands at a distance \(d\) along the ladder measured from the base of the ladder. To analyze the static equilibrium of the ladder-person system, the sum of torques is calculated about the point of contact between the ladder and the wall. Which of the following equations correctly expresses the rotational equilibrium of the system about this contact point in terms of the upward normal force from the floor \(F_N\), the horizontal static friction force from the floor \(F_f\), the masses, and the given geometric parameters?