There are 5 members in Prajakta's family. Prajakta's husband is 5 years older than her and they have 2 sons and Prajakta's father in law is twice the age of her husband. The ratio between the present age of the elder son and the age of the younger son 1 year later is 2 ∶ 1 and the ratio between the present age of younger son and his father is 1 ∶ 5. What is the average age of the family if the ratio between the age of Prajakta two years later and his husband one year later is 8 ∶ 9?