They’re the technical bits of genius businesses cannot do without. On this edition of Business Weekly, we look at the world of semiconductors and why a shortage of them is holding up industries the world over. From consumer electronics to cars, the squeeze on semiconductors affects the supply of everything with a computer chip. Also, Ngozi Okonjo-Iwela becomes the first African and first female director general of the World Trade Organisation. We hear from the woman herself about the task ahead. Plus, should children be learning about bonds, shares and savings accounts as well as algebra and geometry? We speak to pupils around the world keen to learn about finance and money.