The beam below is undergoing distributed loads. $($a$)$ Find the equivalent force resultant $F_R$ and moment couple resultant $(M_R{)}_A$ both acting at point A $.$ Draw the FBD and unit vector showing the force resultant and moment couple. $($b$)$ Then find the distance $"d"$ from point A that the force resultant $F_R$ will be placed to create the equivalent system. Draw the FBD showing the force resultant and moment couple. Note that at this distance d$,$ it corresponds to the centroid of the distributed loads. Do not forget to draw the FBDs for $($a$)$ and $($b$)$ and unit vector!