Analyze gasoline price statistics in the following scenario;

In early 2020, the U.S. retail gas price plummeted from approximately $3 to just over $1 a gallon.

i.)Calculate the price elasticity of demand for gasoline

ii.) Calculate the elasticity of supply using the information provided

iii.) Because there is no viable substitute for gasoline at this time, what can you say about the cross elasticity and income elasticity of the supply and demand for gasoline?

iv.) Is the demand for gasoline elastic, inelastic, perfectly elastic, relatively elastic, or unit elastic?