1=if (group.getLength()<=15.5) return 0.0;else if (group.getLength()<=18.7) return 0.31;else if (group.getLength()<=21.9) return 0.78;else if (group.getLength()<=31.5) return 1;else return 1;
2=if (group.getLength()<=19.4) return 0.0;else if (group.getLength()<=23.4) return 0.31;else if (group.getLength()<=27.4) return 0.78;else if (group.getLength()<=39.4) return 1;else return 1;
3=if (group.getLength()<=23.3) return 0.0;else if (group.getLength()<=28.1) return 0.31;else if (group.getLength()<=32.9) return 0.78;else if (group.getLength()<=45) return 1;else return 1;
