A is older than B by 5 years. Seven years hence, thrice A's age shall be equal to four times that of B. What is the present age of A?

5 years ago, the ratio of the ages of A and B was _____. Again 10 years hence from now, the ratio of their ages will be 7:8. Then, A is _____ years younger than B. Which of the following pair(s) of values can satisfy the blanks? I. 4:5, 5 II. 3:4, 5 III. 2:3, 10

4 years ago from now, the ratio of the ages of A and B was _____. Again 8 years hence from now, the ratio of their ages will be 5:7. Then, A is _____ years younger than B. Which of the following option(s) satisfy the given blanks? I. 5:8, 12 II. 3:5, 12 III. 2:5, 18