-1=if (group.getLength()<=4.9) return 0.0;else if (group.getLength()<=7)return  0.06;else if (group.getLength()<=9.3)return  0.69;else if (group.getLength()<=10.2)return 0.05;else return  0;
1=if (group.getLength()<=4.9) return 0.0;else if (group.getLength()<=7)return  0.09;else if (group.getLength()<=9.3)return  0.99;else if (group.getLength()<=10.2)return  0.07;else return  0;