For the process P(s) to be controlled, there is a perfect model, with a time unit in seconds given by the transfer function: Pm(s) = Km/(s+a)(s+b) Where a = 7.1, b = 2.3 and Km = 7.9 Design an internal model control system (IMC) from the perfect model, to obtain the parameters of the controller, use 2 decimals a) For C_IMC to be proper, the order of the filter must be at least n = ? b) What would be the gain (DC gain or gain at low frequencies) of the transfer function of the designed IMC controller?