How to make deed between 5 siblings that all have rights on property

Hello sir I want your advice for my family property problem. We are 4 brothers nd 1 sister my father is dead my mother is alive. We have totally 17acres in tamil Nadu ramnad district ervadi village in which 7 acres in my mothers name and other 10 acres in my fathers name. We thought of dividing this property as 4ac, 4ac, 4ac, 4ac, 1ac to sister. 4ac fr each brother. The 7 acres in my mother name is given to my 1st brother 4 ac and 2nd brother 3ac inam settlement given to them by my mother. We thought of dividing other 10acres for my 2nd bro 1ac, myself 4ac, my younger bro 4ac and my sister 1ac but after giving 7acres to my elder 2 brothers we found some ec problem in 10 ac property so we are yet to solve that ec problem in 10 ac not solved till now. But my elder brothers who got my mother property are safe and not ready to sign and solve for 10 acres property. We want to make an agreement between all the siblings that all 17acres are common and belongs to all 5 siblings. How to make that deed please help me sir... If we make the agreement they will be ready to sign.