k1 = 1/10;
k2 = 3;
k3 = 3;
k4 = 3;
k5 = 1;
k6 = 1;
k7 = 1/2;
k8 = 1/2;
k9 = 1/2;
k10 = 8;
k11 = 8;
k12 = 8;
k13 = 1;