Permissible and Impermissible actions in Ihraam

Q: A person in the state of ihraam indulged in sexual relations. What is the condition of his Hajj? Can you please explain in detail the laws pertaining to a Mufrid, Mutamatti’ and a Qaarin in this situation?

Q: Is it permissible for one in the state of ihraam to discuss issues relating to sexual intercourse with his wife?

Q: What is the shar’ee ruling if a man covers his feet during ihraam?

Q: What type of sandal or footwear should a person wear in the state of ihraam?