Can sale be made by 2 co sharer of the property out of 3 sharer

Plz advice :-- Religion : Hindu Property: 100sqyd house in Ashok Nagar(West delhi) having 3 co-owners, i.e. uncle(eldest-expired)+my father-expired+uncle(youngest)-alive. Property registered as undivided equal share for all 3 brothers. Eldest uncle was living in this house till 2014(before he expired), occupying 40 sqyd area, as per walls and structure design. Currently no one stays there since last 3 years. However me and youngest uncle wish to sell the property but eldest uncle's heir are not responding to our request. My query specifically is: 1. Can myself and youngest uncle sell our 2/3 undivided share to third party, without eldest uncle heir consent. 2. If 1 not possible, can court intervene and force order to sell as co-owner not responding and property is unoccupied. 3. If 2 not possible, can we send legal notice for judicial partition of 1/3 share each, even if they not agreeing. 4. Can uncle's heir sell 40sqyd without our consent. OR is it better to get stay on property.