USING SAS STUDIO ONDEMAND ONLY!!!!
Step 1. Perform a merge of the demographics, secondhandsmoke, and healthstatus files.
Step 2. Take a sample of 1500 records from the data file you created in #1.
Step 3. On the file you just created select any five variables from the file and create another file
Step 4. Conduct a merge of the demos2013 and demos2015 files.
Step 5. Using the file you just created please create another file with only males.