A plane frame $\text{PQR}$ (fixed at $\text{P}$ and free at $\text{R}$) is shown in the figure. Both members ($\text{PQ}$ and $\text{QR}$) have length, $\text{L}$, and flexural rigidity, $\text{EI}$. Neglecting the effect of axial stress and transverse shear, the horizontal deflection at free end, R, is

1. $\frac{5FL^{3}}{3EI}$
1. $\frac{4FL^{3}}{3EI}$
1. $\frac{2FL^{3}}{3EI}$
1. $\frac{FL^{3}}{3EI}$