Directions: Study the following information carefully and answer the questions…

Directions: Study the following information carefully and answer the questions given below-

Eight persons D, M, P, B, R, S, T and N are related to each other and they were born (but not necessarily in the same order) in 1952, 1956, 1962, 1981, 1984, 1987, 2014 and 2017. Age is calculated as on base year 2023.
N is the nephew of M's spouse. Difference between the ages of N and N's mother is a multiple of 10. M's uncle's age was prime numbered but he was not the oldest. Difference between the ages of D and D's son is a prime number but less than 30. Difference between the ages of B and B's mother-in-law is a multiple of 5. Difference between the ages of B and B's spouse is twice than the difference between the ages of M and S. Difference between the ages of B and B's only sibling is 1/3 of the age of N. M has a son and no sibling. M's uncle is not D. S is not married to B. M has a father. D had no sibling. P is paternal grandmother of M's only son. P is grandmother of T. M's father has no sibling. Gender of M and N is same but not same as S.

What is the average age of B, D, T and N?