y1=? y1=0.3 y1=0.4 y1=0.5 y1=0.6 y1=0.7 y1=0.8 y1=0.9 y1=1.0 y2=? y2=0.0 y2=0.1 y2=0.2 y2=0.3 y2=0.4 y2=0.5 y2=0.6 y2=0.7