Indra Nooyi is the former chairman and CEO of PepsiCo. She was perhaps the first of the Indian Americans to start taking over the big American giants.  Her new book, My Life in Full: Work, Family and Our Future explores her journey to becoming one of the world's most powerful women. She talks to Krishnan about how working from home has revolutionised the relationship between women and work and the importance of business in politics. Producer: Rachel Evans