Pants below the ankles

Q:

1) If you pull up your pants to ensure that it remains above your ankles before going down for rukhu or sajda, does it break your salaat?

2) If your pants falls below your ankles while reading salaat, does it break your salaat?

3) If you perform salaat with your pants below the ankles, is your salaat valid?

4) what type of movements nullify salaat?

Singing "Tala Al Badru Alayna" at a soccer match

Q: At a soccer match on 20th February 2015 fans of a Saudi Arabian soccer team by the name of Ittihad FC 'sang' the nasheed "Tala Al Badru Alayna," and held up a scarf saying: "On Messenger of Allah my beloved." Muslims are getting excited by this, saying MashaAllah. Are these actions of the fans of the fans and the subsequent reaction of Muslims justified? If it is not, would you be kind enough to explain why?

Hadith question

Q: Is this hadith authentic? The Prophet (Sallallahu Alayhi Wasallam) said, 'Whoever recites 4 verses from the first part of Surah al Baqarah, the verse of the Throne, two verses after the verse of the Throne and three verses from the last part of Surah al Baqarah, Satan would never come near him or the members of his family on that day, and nothing he despises would come near him or the members of his family, and never are these verses recited over a madman without him regaining his consciousness' [Darimi 3249/A in the Book of Excellence of the Quran; an-Nasai in the Deeds during the Day and Night]; Ibn Hibban & Tabrani]

Hadith Question

Q: Is this Hadith authentic? "Whoever reads Surah Ikhlas 100,000 times would have bought himself from Allah, and a caller from Allah will announce in heaven and on earth: 'verily, so-and-so has been set free by Allah, so whoever owes him anything, let him claim it from Allah.'"

Discussing aspects about Islam with a non-Muslim

Q: One of my Muslim friends last time started a discussion about apostasy in Islam while there was a non-Muslim there. He sent me some Hadith which I want to share here and I need the exact context in which these hadiths came. He means that why if someone changes his religion from Muslim to some other religion he or she should be killed. He thinks its a cruel act. The Hadiths are:

Allah's Apostle said, "The blood of a Muslim who confesses that none has the right to be worshipped but Allah and that I am His Apostle, cannot be shed except in three cases: In Qisas for murder, a married person who commits illegal sexual intercourse and the one who reverts from Islam (apostate) and leaves the Muslims." — Sahih al-Bukhari, 9:83:17

Ali burnt some people and this news reached Ibn 'Abbas, who said, "Had I been in his place I would not have burnt them, as the Prophet said, 'Don't punish (anybody) with Allah's Punishment.' No doubt, I would have killed them, for the Prophet said, 'If somebody (a Muslim) discards his religion, kill him.' — Sahih al-Bukhari, 4:52:260

A man embraced Islam and then reverted back to Judaism. Mu'adh bin Jabal came and saw the man with Abu Musa. Mu'adh asked, "What is wrong with this (man)?" Abu Musa replied, "He embraced Islam and then reverted back to Judaism." Mu'adh said, "I will not sit down unless you kill him (as it is) the verdict of Allah and His Apostle. — Sahih al-Bukhari, 9:89:271