The sum of the present ages of father and son is 68 years. 8 years ago, the ratio of their ages was 12 ∶ 1. The ratio of their ages after 4 years is
1
15 ∶ 4
2
14 ∶ 3
3
16 ∶ 5
4
13 ∶ 2
The sum of the present ages of father and son is 68 years. 8 years ago, the ratio of their ages was 12 ∶ 1. The ratio of their ages after 4 years is