1.1 Consider the impact of an increase in thriftiness in the Keynesian model. Suppose the consumption function is as follows: C = Cu + C(Y T) where Cu is a parameter called autonomous consumption and c is the marginal propensity to consume. Explain what happens to equilibrium income when the economy becomes more thrifty. Choose the ONE suitable diagram below to substantiate your answer. Include in your answer two (2) possible reasons why consumers would become more thrifty. (15) A A=Y " A=C+I+Xn+G A=C,+I+X,,+GI 1" - '5\" RcalGDPCf) DIAGRAM A DIAGRAM B