10 years ago, Age of Shagun's grandfather is 5 times the Shagun's age and after 5 years from now, age of Shagun's Grandfather will be 3 times the age of Shagun. Find the ratio and Shagun and her grandfather's age before 5 years.
1
1 : 3
2
2 : 5
3
1 : 4
4
3 : 5
5
1 : 5