Years after John Lennon's death, "The Beatles" recorded two songs. What are the song's titles, and how did they do this without the presence of Lennon?

John Lennon's involvement came in the form of an old unfinished demo, recorded in 1977 for a planned musical called The Ballad of John and Yoko that was put aside in the wake of his murder. Yoko Ono provided the tapes that also included rough early versions of "Real Love" (which they later completed), "Grow Old Along With Me" and "Now and Then" (which they passed on).