Let $x$, $y$, and $z$ be nonzero real numbers. find all possible values of \[\frac{x}{|x|} + \frac{y}{|y|} + \frac{z}{|z|} + \frac{xyz}{|xyz|}.\] list your values in increasing order, separated by commas.

‼️‼️‼️‼️‼️the pressure exerted on the walls of a container by a gas enclosed within it is directly proportional to the temperature of the gas. if the pressure is 6 pounds per square inch when the temperature is 440 f, find the pressure exerted when the temperature of the gas is 380°f. (show work)