Inheritance

Q: My father and mother owned a business and they bought a house. My father passed away the business is closed. I have four sisters and me the only son I want to sell the house. How do I go about in giving their shares? Dose my mother get half the amount then split it sharia among my sisters and I or my mother gets 1.6 of the amount? The house was on both my parents names. Now my mother is the executor. I need to no what to do.