Please answer this: Nicholas works in pest control, and needs to have a steady supply of nitrogen gas for his tools. He always keeps a  closed container of nitrogen gas in his freezer, where the temperature is very low.  Nicholas's neighbor, Justin, likes to grill in his backyard. Justin, therefore, always keeps a closed container of propane gas outside, where the temperature is high.  The container of which gas will have lower pressure inside it?
++++++++
Answer: nitrogen gas


Please answer this: Two medical school students named Dan and Bob learned about the human immune system. Dan studied more about the subject, and became very interested to pursue it more in the future.  Which student learned that the infected skin area may become painful?
++++++++
Answer: Dan


Please answer this: Robert and Justin are both patients in the hospital who are suffering complications from their HIV infections. The doctor is trying to get information from both men about their diseases so he can create customized treatment plans for both men. After a few questions, the doctor discovers that Robert has been infected with HIV for many years, while Justin's infection is quite recent.  Who will have a more weakened immune system?
++++++++
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Robert