Question: 1 3. Consider the IS-LM model as presented in the textbook (pp. 115-117) and in class. Suppose the IS part of the model is modified

3. Consider the IS-LM model as presented in the textbook (pp. 115-117) and in class. Suppose the IS part of the model is modified so that: C = C' + by, instead of C = by (that is, there is some so-called "autonomous consumption") and 1 = t(C + G) - ar instead of 1 = /" - ar (that is, investment depends in part on consumer and government demand for output). Let the LM part of the model be the same as before. Then: a. Write this modified model in matrix form Ax - b. b. What is the determinant of A7 When will this model have a unique solution? d. What is the unique solution, if it exists

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