$3.$ There is a steady$-$state flow Q that creates liquid levels $\backslash (\backslash$boldsymbol$\{$H $1\}\backslash )$ and $\backslash (\backslash$mathbf$\{$H $2\}\backslash )$ in the tanks below. At $\backslash ($ t$=0\backslash )$ the inflow is increased of $\text{'}\backslash ($ q $\backslash )\text{'}$ resulting in changes equal to $\text{'}$h$1\text{'}$ and $\text{'}\backslash ($ h $2\backslash )\text{'}$ to the liquid levels $\backslash (\backslash$boldsymbol$\{$n$\}\backslash )$ the tanks, and changes in the flow rates $\text{'}\backslash ($ q $1\backslash )$ 'and $\text{'}\backslash ($ q $2\backslash )\text{'}$ between tanks. Obtain the transfer function for the system when $\text{'}\backslash ($ q $\backslash )\text{'}$ is the input and $\text{'}\backslash ($ q $2\backslash )\text{'}$ is the output.