Using the first moment$-$area method, calculate the angle $($deg$)$ between the tangent lines to the elastic curve at midspan and at the left end $($points A and $B)$ of the simply supported beam shown. The beam is a structural steel W$14$x$53(E=29,000$ksi and $I=541i{n}^4).$

Redo Problem $4$ using the second moment$-$area method to calculate the maximum deflection $($in$).$