grand children right on grandfather property?

I am from Andhra Pradesh ,My grand father purchased a land(agriculture land) and a independent house in 1975 on his name,he did not made any ‘wil’l ,he died in 1982,his wife died in 1995 , he had one son and two daughters .
1)son (died)—one daughter,wife
2)elder daughter have—one grand son——marriage(1970s)
3)younger daughter(died) —- one son,two daughters,husband —marriage(1978)
1)How the property distributed among them?
2)is younger daughter(died) children can claim their share?