Find a state-variable formulation for the system described by the coupled second-order difference equations given. The system

Question:

Find a state-variable formulation for the system described by the coupled second-order difference equations given. The system output is y(k) , and e₁(k) and e₂ (k) are the system inputs. y(k) = v(k + 2) x(k + 1) + q (k) (y) bz = (y)x + (y)-(z + y) (y) + (y) b = (1+y) + (x + y)x