1. Identify the exposure and outcome from the research question below
   • Research Question: Does passive smoking lead to development of asthma in children?
2. Using the National Survey of Children's Health 2019 dataset:
   • Define the exposure (identified from the research question above)
   • Summarize information on the exposure variable
   • Define the outcome (identified from the research question above)
   • Describe how information on the outcome variable was collected
   • Develop an inclusion criteria and exclusion criteria for an epidemiological study with the above research question
   • Write a SAS code syntax for creating a histogram of the variable A1_Age (adult age). Describe the distribution of the variable
   • Write a SAS code syntax for recoding the variable A1_PHYSHEALTH from 5 category responses (excellent, very good, good, fair, and poor) into 2 category responses (good, poor)

Please answer with detailed explanation. No other data, graphs, or tables were provided other than what is posted here.

Thank you