23. Given the photovoltaic system described in Problem 49 in Chapter 2 (Agee, 2012) and defining the following state variables, system input and output as y = x1 = 0m,

x2 = 0m, x3 = ia, and u=ea, write a state space representation of the system in the form i = Ax +Bu,y =Cx. y=\left[\begin{array}{lll} 7 & 2 & 1 \end{array}\right] \mathbf{x}