(Solved): As shown, a truss is loaded with forces P1=202lb and P2=391lb and has the dimension a=2.30ft. ...

As shown, a truss is loaded with forces $P_1=202\mathrm{lb}$ and $P_2=391\mathrm{lb}$ and has the dimension $a=2.30\mathrm{ft}$. Determine $A_x$ and $A_y$, joint $A^{?}$ 's reaction forces' magnitudes in the $x$ and $y$ directions, respectively, and $C_y$, joint $C^{?}$ 's reaction force's magnitude in the $y$ direction. Express your answers numerically in pounds to three significant figures separated by commas.