Please Read the Case Study below about Joan.
Case study for Joan
Joan is a 70-year-old Caucasian woman who has recently been diagnosed with osteoporosis after a fall during which her hip broke. She is 64 inches tall and weighs 115 pounds. Lately she has been reporting muscle pain in her legs. She eats a limited diet owing to a chronic low appetite. A recent blood test shows that Joan’s serum vitamin D level is below normal. Her daily diet includes juice or fruit and toast with butter for breakfast, cottage cheese and fruit for lunch, and salad or a frozen vegetable with meat or poultry for dinner. She dislikes most fish, except canned tuna, and she often drinks a glass of fortified milk before going to bed at night. Although she lives in New Mexico, she spends most days indoors. Joan has been taking a blood-thinning medication since she was discharged from the hospital. She has been taking a daily multivitamin that contains 5000 IU of vitamin A and 400 IU of vitamin D for many years.
2. QUESTIONS (2 of them)

Discuss some food sources that are rich in vitamin D for Joan to consume.
Analyzing Joan's diet and supplement use, what might explain why she now has osteoporosis?
Please write at least two paragraphs. Conducting more research will help you meet the requirement. Note: A paragraph is 8 sentences or more.