Hachiro has just completed a study for his company, AllElectronics, Incorporated, which produces wireless earbuds. This study focuses on the major threats to AllElectronics. Hachiro$$s company uses a specific type of metal that only a few suppliers offer. However, AllElectronics's earbuds would still be affordable for many customers. Furthermore, Hachiro does not see any products that can be used in place of AllElectronics earbuds. Based on what you know about Michael Porter's five forces model, what is the greatest threat to AllElectronics?