Ruling on not obeying parents with regard to medical treatment

Happy Birthday Wishes in Islam

Should he give up his place in the Hajj lottery to his father even though he has not yet done the obligatory Hajj?

She stopped praying when she was sick, then she died; do her heirs have to do anything?

Her parents are disagreeing and each of them is neglecting the rights of the other, and she is asking for advice

I do not want to get married but my parents want me to; am I Islamically obliged to agree?

Is the child obliged to obey the parents and give up his or her share of the inheritance?

His mother mistreats his wife and her family

His parents think that he does not offer the naafil prayers, but he prays them in secret for fear of showing off. Should he tell them about that?

He wants to do Hajj first and his father wants him to get married first