When rollblck_segments rbs_01 created,

CREATE ROLLBACK SEGMENT rbs_01
TABLESPACE
STORAGE (INITIAL 10k NEXT 10k MINEXTENTS 2);

how to make it public or priv. during creation of rbs

20 rbs of my are public- if I don't specific when creating them, they are public. and acoording the formula, some will be online automatically. CORRECT!