SETH ONYANGO, BIRD STORY AGENCY MARKET optimism is spurring a rush of investments into Zambia's agriculture and mining sectors, giving the economy new growth impetus. Investors include Kobold, a consortium linked to tech titans Bill Gates, Jeff Bezos and Richard Branson, now tipped to stir up Zambia's Foreign Direct Investment (FDI) scene with planned investments into its mining sector. The California-based mineral exploration firm is eyeing the country's mines for electric vehicle components, leveraging reformist President Hakainde Hichilema's efforts to revitalise the economy. Upon his landslide poll victory in 2021, part of Hichilema's economic blueprint entailed placing an electric vehicle…