Using the demand and supply. curves in the. following markets, show the direction of changes in the demand and supply in the scenarios give.

a. A Pandemic causes people to worry about safety and shy away from air travel. At the same time, jet fuel becomes less expensive.

b. A Genetically modified hormone enables large milk producers to enhance the productivity of each cow. At the same time, a medical report suggests that drinking milk causes people over 50 to look younger.