Hybrid cars are generally considered as environment friendly solution for rising petrol prices across the globe. People prefer hybrid cars due their decreased dependence on petrol. Assume a market for hybrid cars. Identify which of the determinants of supply or demand are effected in each of the following situations. Indicate the increase or decrease in supply or demand. Draw a supply and demand diagram and show the effect on equilibrium price and quantity of the hybrid cars.

a) Government endorses a research that portrays hybrid cars as the best option available for better environment.

b) Price of petrol falls.

c) Price of electric cars falls

d) COVID-19 pandemic induces recession that lowers people's wealth.

e) Students from NED University of engineering and technology develop a faster and cheaper production technology to produce hybrid cars.