Bill Gates retired from Microsoft, and is now focused on investing in and improving sanitation! Why? Name the several specific innovative solutions that the Gates Foundation is supporting in its work on a public sanitation system. Describe the problems and challenges that need to be overcome, how they are proposing to be addressed, the key stakeholders involved, and what are the potential direct and indirect benefits to communities? What are social determinants and/or environmental outputs (no pun), benefits and outcomes of this initiative? Other than sanitation, how else have entrepreneurs and investors used innovations and social determinants of health to change incumbent systems and improve impact outcomes? Please cite specific examples from the reading to support your analysis.