If you’re an entrepreneur or think you have the makings of one, advice on how to get there and stay there is always welcome. Among the things you need are perseverance and talent in the art of hustling. CNBC Africa’s Jill de Villiers speaks to Marnus Broodryk – entrepreneur, self-made millionaire, advocate for small business, and the youngest Shark on the M-Net’s Shark Tank South Africa – about his book 90 Rules for Entrepreneurs, the Codex of Hustle….