Right, though he was not numbered with the apostles he was a disciple from the baptism of John and a witness of the resurrection.
Yes, this is how I have perceived it, though I am also willing to consider that he was including Matthias, who was one of the twelve when Paul was writing 1 Corinthians 15.
Yes, but Matthias as all the Apostles except Paul actually saw the resurrected Christ preascensioned. Paul saw the resurrected Christ only post ascension. John saw Christ both ways.
Paul used that very term regardion the 500 that all saw Him to mean at the same time.
As to Christ entering to be intercessor, as I said, I interpret that to mean until His seconded appearing, Hebrews 9:12; Hebrews 9:24: Hebrews 9:28.
Yes, Mark 16:1 ought to be a reference there, as well as Luke 24. Probably would be better to say "Mary Magdalene, Mary the mother of James, and other women." The two Marys are named in all three accounts, and Luke 24:10 suggests there might have been more than just Joanna and Salome with them.
Number 6 seems incomplete.
Should it not also include Cleopas and his companion as being there, as well as others, i.e., "and them that were with [the apostles]"? Luke 24:33-36
33 And they rose up the same hour, and returned to Jerusalem, and found the eleven gathered together, and them that were with them, 34 saying, The Lord is risen indeed, and hath appeared to Simon. 35 And they told what things were done in the way, and how he was known of them in breaking of bread.
36 And as they thus spake, Jesus himself stood in the midst of them, and saith unto them, Peace be unto you.
Thanks. Looks like this tracks pretty much with what I have, except my revision to include "To the twelve, an unspecified mention that may include Matthias, 1 Corinthians 15:5" (new #4) and that author's combining my "To the apostles on a mountain in Galilee" and "To over five hundred brethren" into one event.