Group by on three tables as one master table and two detail tables

Master table ———————- Ownerid ownername

  1.   Abc 
  2.   Xyz 
  3.   Pqr 

Detail table 1 ———————- Detailid Listid Ownerid

  1.   1.     1 
  2.   1.     2 
  3.   2.     1 
  4.   3.     1 

Detail table 2 ———————- Detailid Tagid Ownerid

  1.   1.     1 
  2.   1.     2 
  3.   2.     1 
  4.   3.     1 

Result i want as Ownerid Listcount Tagconut

  1.  3.        3 
  2.  1.        1