Do you know why you are doing this? Viv Groskop talks to Yewande Akinola MBE,  chartered engineer and TV presenter, about the power of knowing your purpose when it comes to connecting to your audience. She reveals the setbacks and criticism that come with building a public profile and argues that if you think of your work as an extension of who you are, it becomes less daunting. Find out more about Yewande's work at yewandeakinola.co.uk  Viv's book, Lift As You Climb is out now. @vivgroskop