If it’s Thursday, it must be time for … Education Monday. But first, I’d like you to meet some of my cardiac rehab pals. Most of the heart warriors in my 11 a.m. Monday-Wednesday-Friday group are north of age 70. I am, at 58, known as the “Kid.” Not complaining. The cast of characters (and I mean that): There’s my good buddy, Sir Charles, a soft-spoken retired GM welder who underwent a quadruple bypass earlier this year. At 81, he’s a devoted baseball fan who has aptly dubbed the Detroit Tigers 2018 team “those bums.” There’s Hilarious Harvey, 73, a triple bypass and stroke patient who uses a foldable vinyl…