Question $2.$ What is degree of freedom analysis? Consider the perfectly mixed storage tank in which the liquid stream flows with volumetric rate $F_f(\frac{m^3}{s})$ and density ${}_f.$ The outlet stream has volumetric rate $F_o$ and density ${}_o.$ The model for the variations of the tank holdup is represented by following equation. Comment on the solution the given system based on the degree of freedom analysis? $A\frac{dL}{dt}=F_f-F_0,$ with initial conditions, $L(t_i)=L_i$