A.(10,50,80,30,60,20,15,18) B.(10,18,15,20,50,80,30,60) C.(10,15,18,50,80,30,60,20) D.(10,30,60,20,15,18,50,80)
A.10 B.11 C.21 D.36
A.4,3,2,1 B.4,2,1,3 C.1,3,2,4 D.3,4,2,1