costa rica independence from spain

how do you say Columbus discovered costa rica in 1502?
Also these following sentences:
-Costa Rica gained independence from Spain in 1821.
-Christopher Columbus is from Spain.
-The population in Costa Rica is 4.299 million.
-The language spoken in Costa Rica is spanish.
Please! my projects do tomorrow =/ lol
-Costa Rica descubrío Costa Rica en 1502.
-Costa Rica obtuvo la independencia de España en 1821.
-Cristobal Colón es español.
-La población estimada de Costa Rica es de 4.299 millones.
-El lenguaje oficial de Costa Rica es español.
La Fortuna costa rica independence day