Emmy-winning showrunner Marta Kauffman discusses the arc of her epic career, from her early struggles in New York to the evergreen popularity of “Friends,” and now her success with “Grace and Frankie,” headed into its sixth season. Kauffman talks about what it’s like to work with the “Grace and Frankie” cast, led by Jane Fonda and Lily Tomlin, and she shares the moment she learned Pete Davidson would be rapping about the show on SNL. She also speaks candidly about dealing with misogyny in Hollywood, her own experience with “imposter syndrome,” and the importance of learning to say “no.”