 So let's meet the finalists. First, we're going to start with a woman from Kenya who's trying to stop pests destroying farmers' fields. Esther, as we would say back home, welcome. Tell us about your solution. My name is Esther Kimani. I'm the founder of Pharma Lifeline Technologies, where we get farmers ahead of crop pests and diseases. It's simply using technology to help them detect the pests and diseases on time.