tolong bantuin yg nomer 4,6,8 .pliss dibantu sekaligus caranya y

4.a.1/3 > 1/2 = 2/6 > 3/6
b.-3/4 < -15/4
c.(-7)×3 > (-2)×7 = -21 > -14
d. 4×(-5) > 9×(-5) = -20 > -45 (benar)
6.a.-3 < -2 < -1 = -3 < -2 & -2 < -1 (benar)
b.1 < 2 < -3 = 1 < 2 & 2 < -3
c.-1 > -2 < -3 = -1 > -2 & -2 < -3
d.-1 < -2 < -3 = -1 < -2 & -2 < -3
8.(i). 2/5 > 3/5 > 6/5
(ii). 1/2 > 1/3 > 1/5 = 15/30 > 10/30 > 6/30
(benar)
(iii).2/3 > 1/2 > 7/15 = 20/30 > 15/30 > 14/30
(benar)
a.(i) & (ii)
b.(i) & (iii)
c.(ii) & (iii) = benar
d.(i), (ii) & (iii)