Coal, steel. An economy is based on two industrial sectors, coal, and steel. Production of a dollar's worth of coal requires an input of 0.10 from the coal sector and 0.20 from the steel sector. Production of a dollar's worth of steel requires an input of 0.20 from the coal sector and 0.40 from the steel sector. Find the output for each sector that is needed to satisfy a final demand of 20 billion for coal and 10 billion for steel.
a. 22 billion for coal and 8 billion for steel
b. 18 billion for coal and 12 billion for steel
c. 20 billion for coal and 10 billion for steel
d. 16 billion for coal and 14 billion for steel
