The figure shows a system with two inputs and two outputs. Derive C$1($s$)/$R$1($s$),$ C$1($s$)/$R$2($s$),$

C$2($s$)/$R$1($s$),$ and C$2($s$)/$R$2($s$).($In deriving outputs for R$1($s$),$ assume that R$2($s$)$ is zero, and

vice versa.$)$