Mutation and partition of property

Sir., We are three brothers and two sisters living . Our father owned a residential house purchased from improvement trust., amritsar in the year 1982 bya registered sale deed in his favour. The purchase price and construction was got done out of the savings by one of the eldest son, and sale of one residential house in the year 1970( date of purchase of plot and completion of construction year 1972). The father was having meagre salary during those days and has to support a family of 7 persons (himself, our mother and 5 children). the eldest son started job in 1965 after completion of age of 18 years and was a bank employees and state and central government employees from 1965 onwards). Our father left a registered will thereby proclaiming that after his death( who deceased in the year 1990) the property will rest with his wife( our mother) and after her death the property will belong to all the three sons in equal share and nothing will be payable or shareable by two daughters( our sisters). The mutation of the residential house purchased in 1982 as narrated above was not got done on the belief that since it is purchased from autonomous body established under the law, hence no mutation is required. Our question: Can the mutation be got done now. we have got khasra number . and this khasra number was obtained from improvement trust amritsar through written letter. 2. if yes, what is the official procedure? i.e. application form be filled up by all surviving sons ., documents required., and charges for such long due mutation. We have death certificates of both father and mother issued by sub registrar of births and deaths. Any family tree to be prepared if yes who will authenticate it as all the names are mentioned in the registered will., i.e. names of wife, sons of father and daughters etc., 3. what is the complete procedure for partition of this residential house in three equal shares.? ( any family agreement to be made among brothers. whether sisters are also to join family agreement)? Partition deed to be prepared. Whether such partition deed is to be got registered with sub registrar and how much stamp duty and registration fee is payable. Whether after such partition each one will get fair and valid title and will be able to dispose of its share in any manner i.e. sale etc., What are the ingredients of partition deed to avoid any dispute among share holders in future.