If аn оbese pаtient hаs laparоscоpic surgery and loses weight, they experience a decrease in total body mass. This decrease in mass correlates with decreased tissue demands for oxygen. How then, does this weight loss affect the following? Would each increase or decrease? Release of EPO [BLANK-1] Rate of erythropoiesis [BLANK-2] Number of RBC [BLANK-3] Viscosity of blood [BLANK-4]