Answer:
Panama city, Denver, and El Aguilar
Step-by-step explanation:
The surface pressure is the pressure existing within the atmosphere of the earth. This measure depends greatly on altitude. The greater the altitude of a surface, the lower its atmospheric pressure gets. In Panama City, we are almost at sea level.
From that point upwards, atmospheric pressure decreases at a rate of 1.2 kPa every 100 mt. Therefore, El Aguilar is the location where the surface pressure is lower.