8 Suppose that an initial $40 billion increase in investment spending expands GDP by $40 billion in the first round of the multiplier process. Also assume that GDP and consumption both rise by $24 billion in the second round of the process. Instructions: Round your answers to 1 decimal place. a. What is the MPC in this economy? $[ b. What is the size of the multiplier? c. If, instead, GDP and consumption both rose by $32 billion in the second round, what would have been the size of the multiplier