What were the three main G's for the Age of Exploration explorers?

A small, speedy, and super-maneuverable sailing ship from the 1400s and 1500s, used by explorers like Columbus

Portuguese prince (1394-1460) who promoted the study of navigation and directed voyages of exploration down the western coast of Africa.

Spanish explorer who became the first European to see the Pacific Ocean in 1510 while exploring Panama

Portuguese navigator who led the Spanish expedition of 1519-1522 that was the first to sail around the world. He didn't make it to the end, but a part of his crew did

Italian explorer who "discovered" the New World (for Spain) while looking for a route to Asia.

Which early America empire used the Quipu system of knotted cords for recording?

Spanish explorer who led the conquest of the Inca Empire of Peru in 1531-1533.

In 1488, he was the first European to attempt to go around the southern tip of Africa.

Supreme rulers of the Inca empire, descendants of the Sun god Inti

The ancient capital of the Aztec empire

Portuguese explorer. In 1497/ 98 he led the first naval expedition from Europe to sail to India (Calicut), opening an important commercial sea route.

Which early American empire created massive stone heads?