limited type

Hello,

1°) I have a tagged limited type. I want also to derived this type
from an other not limited. Is is possible ? Example :
type T_Object is tagged private;
type T_Toto is new T_Object with limited private. Possible ????

2°) I have a tagged limited type. I have an other which derived from
this base type. Is this new type is limited ? Example :
type T_Object is tagged limited private;
type T_Toto is new T_Object with private. Is is Toto limited ????

thanks,

.