The frame structure shown in the figure has fixed support at A and pin support at $D.$ When $w_0=4\mathrm{.}8\frac{k}{f}t$ and $20-k$ force is applied to member $AB,$ determine reactive forces at supports A and $D.A$ is a fixed support and $B$ and $C$ are pin joints. Member $CD$ is a quarter circle. All numbers should be rounded to $2$ decimal places.