const ntotal=20; const ngrps=2; const wd=[230,250,200,250,180,220,180,250,200,200,180,250,250,250,250,250,200,250,180,180]; const mwd=[100,110,90,110,90,90,90,110,90,95,90,110,120,120,115,115,100,120,90,90]; const ctt=[]; for(i=0;i