Medicare and MedicaidWeek 3 Learning Resources Chapter 6 in Aldwin and Gilmer text, Health, Illness, and Optimal Aging: Biological and Psychological Perspectives talks about the internal organ systems. Write a paragraph about what you understood from reading this chapter. Please touch on the following topics: What are the main organ systems discussed in this chapter? Which organs show relatively little change with age? Which organs are more likely to change? What helps to slow down aging? What accelerates aging?2. Chapter 7 talks about sensory, nervous, endocrine and immune systems. Identify an illness that is related to each of these systems and describe in your own words how one can promote optimal aging for each system.3. Write a short description of Medicare and Medicaid.