Can daughters challenge will and claim an equal share in the property of Goa?

We are a goan family and our father inherited a property from his father in Goa. We are three sisters and one brother. Now, the property constitutes of a house and land. The major share of the house and land has been willed to my brother. My brother has also been willed a house & land in another state as well while we sisters have got small portions of land in both places. My brother is unable to maintain the house and our portion of the land is unusable hence we suggested to sell the entire property but he is not in favor of that. - According to the prevalent Goa law, as daughters, could we challenge the will and claim an equal share in the entire property? Also, the Form I & IV is in the name of my grandfather and father who are deceased. While my father was alive, his brothers and sisters surrendered their share in the form of gift deeds in favor of my father. - What is the process of deleting my grandfather & father's name from Form I & IV and adding our (3 sisters and 1 brother) names in it? - Lastly, can our cousins claim a share in the property in spite of their parents surrendering their share in favor of my father?