According to Bureau of Economic Analysis, during the recession of 2008-2009, household saving as a fraction of disposable personal income increased from a low of just over 1 percent in their first quarter of 2008 to 5 percent in the second quarter of 2009. All else equal, what impact would this change in saving have on the MPC, MPS, and multiplier? How would this change affect equilibrium output when planned investment changes?