The ratio of sugar to water in a solution is 4:5. If 15 liters of sugar and 10 liters of water are added to the solution, the ratio of sugar to water becomes equal. Find the new ratio of sugar to water if 25% of the mixture is removed and then the same amount of water is added to the remaining mixture.
1
1:2
2
2:3
3
4:5
4
5:4
5
2:1