A researcher in Denver, $CO$ has almost used up a cylinder of gas obtained from a company in Houston, TX$.$ The company specifies to return the cylinder with at least $1$ atm gauge pressure.

a$)$ The pressure reading is $20$ psig at $5PM$ when the researcher leaves the laboratory. The laboratory temperature is $68F.$ Overnight, the steam heater fails, and the laboratory temperature drops to $60F.$ What is the gauge reading in the morning?

b$)$ The researcher decides to return the cylinder, removes the regulator with its gauges and caps the cylinder for shipping. The gas company in Houston, where the temperature is $30C,$ mounts a regulator that has a pressure gauge with SI units on the cylinder. What is the reading? Is the company's request for residual pressure met?

State any assumptions that you make and the source of any information you may retrieve.