Solve part ii) and iii)

Dear Student,
Old Ratio - 3:2 (X:Y)
ii) X's sacrifice - 3/20 
Y's sacrifice - 1/20
X's new share - 3/5 - 3/20 = 9/20
Y's new share - 2/5 - 1/20 = 7/20
Z's share - 1/5 × 4/4 = 4/20
New Ratio = 9:7:4 ( X:Y:Z)
iii) X's sacrifice - 1/10
Y's sacrifice - 1/10
X's new share - 3/5 - 1/10 = 5/10
Y's new share - 2/5 - 1/10 = 3/10
Z's share - 1/5 × 2/2 = 2/10
New Ratio = 5:3:2 ( X:Y:Z)
Regards