A fresh graduate who just started his new job is choosing between two commuting cars of comparable sizes.The first is traditional gasoline car and the second is all-electric car. The anticipated usage of the car is 20,000 km per year. The market value for both cars folllows a Decline Balance Depreciation model.Given the data in table below assuming that paying will be in cash, answer the following at 0% interest rate.

	Gasoline car	All-electic car
Price	$24,000	$36,000
Consumption	6.5 litre per 100 km	12 kWh per 12 km
Fuel/Energy price	$0.85 per litre	$0.2 per kWh
Deprecition rate	12%	10%

a) If the car model to be sold after 3 years, which car model is more economic??

b) What gas price would justify the gasoline model, over the all-electric model, if the commuter will resell the car after 4 years?

c) How many years of usage will justify buying the all-electric model? (Hint: the answer could be a fraction value).