Breaking one's fast according to the sunset time mentioned on apps and websites

Q: I’m fasting. I try to follow the most accurate sunset times. Of course these different sites and apps make estimates of what sunset time is. For e.g, today one would said sunset is at 3:53, another two said 3:54 and another site said 3:55. I naturally would follow the latest one as a precaution, but nevertheless, would it be permissible to follow the earliest time?

Muslim woman inheriting a house from her non-Muslim mother

Q: A non-Muslim woman owns a house in a non-Muslim country. When she passes away, the law of the land gives the entire house as inheritance to her Muslim daughter, who is her only child. What should the Muslim daughter do with the house, given that a Muslim is not allowed to inherit from a non-Muslim in Islam? Should she give it to the state? Or should she give it to her non-Muslim aunts and uncles, even though these do not expect to get it? Or can she keep the house?

Getting a share from one's father's business while he is still alive

Q: I have a question regarding inheritance and family business profits.

I live in a different country as my parents and my father has a business. It is a family business and I've worked in it in the past. My father doesn't go to work a lot these days and my brother manages the business. I am away and so not involved in the business.

My question is about inheritance and access to money from the business. I don't ask for money and I have a job that pays my bills. My brother on the other hand takes money from the business and makes bold decisions when it comes to buying things with family money.

Am I eligible to get a share of the profits from the business as per shariah? I understand that if the business is sold then I do have a share but while the business is running and my father is alive, is it immoral for me to take a share from profits even when I am not involved?

Mistakenly standing up for the third rakaat in a two rakaat salaah

Q: If while praying two rakaats salaah, after sujood of the two rakaats, one forgets he has completed one or two rakaats and therefore stands up with the intention of praying one more rakaat and doing sajda sahaw but on standing he remembers accuratley that he in fact has completed two rakaats.

1. In this situation, while he has stood up with or has already started reciting Surah Fatiha, is it permissible to go to tashahhud or one should complete four rakaats?

2. Would sajdah sahaw be needed after completing four rakkats?

3. Or salah will not be valid and one must repeat it, if for example he was praying two rakaat sunnat muakkadah of Fajr or two rakaats Fardh of Fajr because he has prayed four rakkats instead of two?