two things charley asks willy for advice on and how willys responds both times?

Willy offers advice to Charley at every opportunity in an attempt to assert some dominance over him. He interprets a man as a person who can handle tools well, returning to a physical definition of manhood in comparison to monetary or status-based definitions that would assert Charley's superiority. Charley, for example, complains about heartburn. Willy's response is, "No, you’re ignorant. You gotta know about vitamins and things like that." Willy proceeds to tell Charlie all about vitamins and the body.