Inheritance property

Hi Sir/Madam, I would like to ask one question regarding property from Ancestors My father has a property in his name which he got from my mother’s parents , he passed away 3 years ago without leaving a will. As I know, not sure am I 100% right that this property should now distributed equally in his kids and wife my question is that - is mutation is necessary in my mother’s name If yes , do we have to surrender our share in our mothers name for mutation ( we are 4, bother and sister )? And after surrendering our share in her name- will she be the only owner of the property ?? will she be able to give property to any one ? And also is mutation is compulsory and is there any time frame to do this ? thanks