Revelation and the Prophet?

How was the Revelation conveyed to the Prophet?

The Revelation was delivered to Prophet Muhammad in the following ways:
a. The commencement of Revelation to the Prophet took the form of reliable dreams ( ru’ya al-sadiqa). Whatever he dreamed happened the following day, in exactly the same way that he had dreamed.
b. Coming in the form of a human being, Archangel Gabriel conveyed the Revelation to the Prophet.
c. Archangel Gabriel approached the Prophet in his own angelic form and thus delivered the Revelation to him. It was reported that such Revelation happened only two times; first, during the first stage of the Revelation and second, in the cave of Hira, following a period of temporary cessation of
Revelation.
d. Without appearing to the Prophet, the angel put the Revelation straight into the Prophet’s heart
when he was awake.
e. Archangel Gabriel conveyed the Revelation to the Prophet during his sleep.
f. Sometimes, the Qur’an was revealed like the ringing of a bell. This form of Revelation was most severe for the Prophet. When this state of Revelation passed the Prophet had memorized what had been revealed.
g. Delivery of the Revelation to the Prophet when he was awake, directly by God Almighty Himself. It was reported that such Revelation was delivered to the Prophet during the Mi’raj – the Prophet’s night journey from Mecca to Al-Aqsa Mosque in Jerusalem and his ascension from there to Heaven.