Anybody knows ?? This is 6th grade history work , can you guys answer all does questions please for 28 points plus !! BRAINLIST , please help me.

1. Silver, gold
2. Aztecs and Incas
3. Not quite sure, but the Potosi Silver Mines were discovered in 1545
4. Between 1500 and 1650, the Spanish imported 181 tons of gold and 16,000 tons of silver from the New World
5. Not sure, but probably around the time the Potosi mines were discovered.

Sorry i just needed some points :( i feel bad