One Grand Father, One Father and One Grand Son Sum of their age is 140 Years. Grand Son's age in month is equal to grand father's age in month is equal to grand father's age in years.

One Grand Father, One Father and One Grand Son Sum of their age is 140 Years.
Grand Son's age in month is equal to Grand Father's age in Years.
Grand son's age in days is equal to Father's age in weeks.

What is the age of all there?