Based on the O2-binding graphs for Proteins A,X and Y, choose all of the correct statements. Even though the YO2 values are only shown up to 120 torr, you can assume that YO2=1.0 for all 3 proteins when pO2 is very high and is saturating. Protein Y has p50=40 torr Protein X has p50=20 torr Protein Y shows a higher level of positive cooperativity than protein A The Hill coefficient for Protein X is greater than the Hill coefficient for Protein A Protein A has p50=25 torr