Veteran music executives Kevin Liles and Lyor Cohen open up about their work running Def Jam and 300 Entertainment and working with a roster including Jay Z, Beastie Boys, RUN DMC, A Tribe Called Quest, Ja Rule, Mariah Carey and Public Enemy. The executives also tackle issues of class, race, gender, technology and the challenges of balancing business and art in the latest episode of “Mavericks with Ari Melber,” a series of interviews with artists, musicians and cultural icons.