Eight years ago, Maria's age was equal to the sum of the present ages of her only son and her only daughter. Ten years hence, the ratio between the ages of her daughter and her son will be 6 ∶ 5 at that time. If Maria's husband is 8 years older than her and his present age is four times that of her son, then what is the present age of Maria's daughter?
1
14 year
2
10 year
3
15 year
4
12 year