Imagine that it takes an average Australian miner $10$ hours to mine a metric ton of coal and $20$ hours to mine a metric ton of

$5$ manganese. It takes the average South African miner $4$ hours to mine a metric ton of coal and $12$ hours to mine metric ton of

manganese.

Macmi

a$.$ Fill in the table below to show the productivity of each group of miners.

Country

Hours to mine a metric ton of coal

Australia

$10.$

South Africa

$4$

Hours to mine a metric ton of manganese

$20$

$12$

b$.$ Fill in the table below to show the opportunity cost for each country mining.

Country

Opportunity cost to mine a metric ton of coal

Australia

tons of manganese

South Africa

tons of manganese

Opportunity cost to mine a metric ton of manganese

tons of coal

tons of coal