Guesses: "a" sounds like like "Love Grows Where My Rosemary Goes"; I forget the group."d" is "Please Release Me" by Engelbert Humperdink (now, I think, just Englebert; his real name is Gerry Dorsey). "e" is from the musical HAIR: "When the moon is in the seventh house/ and Jupiter alligns with Mars/Then peace will guide the planets/And love will steer the stars/ This is the dawning of the Age of Aquarius, Age of Aquarius....Let the sun shine/Let the sun shine in..." The medley (it's really two songs from the show) was a hit for the Fifth Dimension.