What restrictions does that place on the operating pressures

Question

Problem

1. A heat pump for a 20?C house uses R-410a, and the outside temperature is -5^oC. What is the minimum high P and the maximum low P it can use?

2. A heat pump uses carbon dioxide, and it must condense at a minimum of 22^oC and receives energy from the outside on a winter day at -10^oC. What restrictions does that place on the operating pressures?

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.