Please list the bowling skills of all the players from Australia.
Australia refers to Country_Name = 'Australia'
SELECT T2.Bowling_Skill FROM Player AS T1 INNER JOIN Bowling_Style AS T2 ON T1.Bowling_skill = T2.Bowling_Id INNER JOIN Country AS T3 ON T1.Country_Name = T3.Country_Id WHERE T3.Country_Name = 'Australia' GROUP BY T2.Bowling_Skill