2) AC: 7/2 = 3.5,AB: 6/2 =3, and BC: 4/2 = 2
3) AC: (7)3 2/3 = 25.7 or 25 2/3, AB: 6(3 2/3) = 22, BC: 4(3 2/3) = 14.7 or 14 2/3