While a sagging porch is leveled and repaired, a screw jack is used to support the front

Question:

While a sagging porch is leveled and repaired, a screw jack is used to support the front of the porch. As the jack is expanded, it exerts on the porch the force-couple system shown, where 300 R = N and M =37.5 N ⋅ m. Replace this force-couple system with an equivalent force-couple system at C.

While a sagging porch is leveled and repaired on the porch the