30 W
All of them are.
Peru, South America (and capital city) is to the West of the Prime Meridian. The 75 degrees west line of Longitude runs through Peru.
All of them are.
East
90`w
All of them are.
W
East
The coordinates of Lisbon are 38.7223° N, 9.1393° W. Which means that Lisbon is West of the Prime Meridian (the Prime Meridian is zero degrees of Longitude).
For a person living west of the noon meridian (which is at 0° longitude), solar time would be behind the standard time at that meridian. Specifically, for every degree of longitude west, solar time lags by about four minutes. Therefore, if someone is at a longitude of, say, 75°W, their solar time would be approximately three hours behind noon (75 degrees x 4 minutes per degree = 300 minutes, or 5 hours). This means that if it is noon at the noon meridian, it would be around 7:00 AM solar time for that person.
By a W for West
The majority of the lands east of Peru are in Brazil (in the northeast) and Bolivia (in the southeast).Some minor locations in Ecuador and Colombia (north) and Chile (to the south) are also east of some areas in Peru. So all or part of any South American country could be farther east than Peru.