Someone please help with these Spanish questions. Find the correct indefinite article.

Find the correct indefinite article.

Question: examen.

un examen.

Translation: an exam.

Question: goma.

una goma.

Translation: a rubber.

Question: maestra.

una maestra.

Translation: a teacher.

Question: profesor.

un profesor.

Translation: a teacher.

Question: mapa.

un mapa.

Translation: a map.

Explanation:  

Articles are words that go with nouns to help identify them. They must always agree with the gender and number of the noun – plural or singular, feminine or masculine. We use Indefinite articles to talk about things in general or an object we don’t know or cannot identify.

Spymore

1. la ceiba is a caribbean port city in northern honduras. it’s the gateway to the bay islands of roatán, útila and guanaja. part of a vast barrier reef, the islands have dive sites teeming with marine life such as whale sharks. south of la ceiba, pico bonito national park is rich in wildlife, including jaguars and toucans. to the west is thecuero y salado wildlife refuge, with mangroves and lagoons home to manatees.weather:   70°f (21°c), wind n at 0 mph (0 km/h), 91% humiditypopulation:   197,267 (2013)  united nations

Yo escondi mis notas.