Calculate the appropriate elasticity coefficient in each of the following cases using the relevant formula Zg a. A drop in the price of hybrid cars from $25 000 to $20 000 causes purchases of gasoline-powered cars to fall from 1 million to 750 000 per year. b. Monthly purchases of smartphones rise from 15 000 to 17 500 when the average price of smartphones decreases from $500 to $400. c. A fall in average consumer incomes from $80 000 to $50 000 raises weekly purchases of canned sardines from 2000 to 3000 cans.