that was masterclass ceo david rogier. really appreciate him sharing that with us.ation apple. tim cook and his deputies cultivating a new era of leaders. we will take a look at who's who, next. this is bloomberg. ♪ emily: as ceo tim cook begins his 10th year at the helm of apple, he and his top deputies focused on the next generation of leaders. those who will run some of the iphone maker's most important divisions, from hardware to marketing. for more, i want to bring in mark gurman who covers apple and consumer technology for us. obviously, tim cook has been upfront. there are some longtime deputies like eddie q, phil shiller. who's on the bench though, really, to potentially move into position when tim cook gets tired of his job? mark: the biggest question is who is going to be the next ceo of apple? and the answer is quite clear and that's going to be coo jeff williams. the only wrinkle that williams is two to three years younger than cook. if we are looking at this from an age perspective, he likely won't be ceo for long or could simply be ceo if cook steps do