Property partion between brother and sister

My father and mother have there diffrent property on there individual name. They have 4 childreen , 2 son and 2 daughter. Lands are purchased by them before 1983. Now they have grown old my brothers are not keeping them properly. My brother had prepared one documents from courts in which all property of my mother and even my father were listed. And asked us sisters to sign, we signature the documents even father had also signatured. It was mention in that we the girls don't have any right's in the parent property. And from total property which part will be of younger brother and other of elder was menstion. 1 time signature in court at that papers are done. Brother is saying need to come 3 times for signature at courts (but not sure). As the condition apearing of our parents in front of me. I want the property should be partitioned in 3 parts. My parents should hold some property on there name by which they can manage there living. And the person who ever will be taking care of him that property they can later give them. Or how should we girls approach to get partion in parents property. Parents are now living with me and I will only keep them. There is no will prepared by my parents. Guid the right decision that we should do.