Q20. National economy control may be represented by the block diagram of Fig.2. Private business investment uctuates disturbance of the system. Government senses the deviation of actual national income from the desired one and changes the business investment in order to hold the national inconle within tolerable limits. I. Determine the transfer mction C(slfRIs} when the private business mwsmlentiszem. II. Determine the steadystate error when private business investment is zero and desired national income is represented by a unit step function. III. Determine the transfer junction C[5}j'D[s] when the government does not act as a controller [loop involving government is open]. Also comment upon the stability of this system. Figure 2