For Question 4, the option that is not common in the Casco Viejo district is high-rise buildings. Casco Viejo is known for its historic architecture, including old houses, patios, and coats of arms, but it does not feature modern high-rise buildings.
For Question 5, you can find a Panamanian wildlife refuge next to the Panamá Canal. The area surrounding the canal includes various wildlife refuges and national parks.