$7)$ In the figure below, the initial voltage across the $30$ mF capacitor is $0$ V $.$ Switch $1$ is closed for a long time and it is opened at $t=0s$ and Switch $2$ moved from position A to position B$.$ Answer the following question no$.7,8$ and $9.$

What is the initial voltage$($in V $)$ across the $20$ mF $?$

$8)$ What is the final voltage $($in V $)$ across $30$ mF $?$

$9)$ If $E_{\text{i}\text{n}\text{i}\text{t}}$ is the initial energy in the circuit at $t=0^{-}$and $E_{\text{f}\text{i}\text{n}\text{a}\text{l}}$ is the final energy at $t=$ after connecting both the capacitors, then, what is the value $\frac{E_{\text{i}\text{n}\text{i}\text{t}}}{E_{\text{f}\text{i}\text{n}\text{a}\text{l}}}?$