Use the supply and demand diagram to evaluate and explain the following situations: 

a) Industries that sell inferior goods do well in an economic downturn. 

b) College attendance has at increased at the same time that tuition rates have also increased. 

c) Is more difficult for public schools to find chemistry teachers than it is to find art teachers 

d) Any success the government has in reducing the supply of illegal drugs tends to create more crime as a result, not less.