1.- The Liquid-Level system shown in Fig. 1 has a cross section area A=2[m2]. Furthermore, the output valve presents a flow resistance R=2[min/m2]. Considering that the tank is empty at t0[s], and the transfer function that relates the input flow qi(t) with the liquid level height h(t) is Qi(s)H(s)=RAs+1R answer the following: Fig. 1 Liquid-Level system. a) Applying an input step of magnitude 3; Which is the liquid level height at 4 [min]? b) Plot the liquid level height at any given time t and support your response