please answer sir

Walmart wants to increase its total revenue. One strategy is to offer a discount on every electronics it sells. Walmart knows that its customers in Toronto and Montreal will have different responses to the discount on televisions. This information shows how the two cities response to the discount: Volume of sales before the 11% discount ($1000 to $890) : Toronto: 180,000 Montreal: 151,000 Volume of sales after the 11% discount ($1000 to $890) : Toronto : 190,000 Montreal : 160,000 1) Price elasticity of each city? 2) revenue change in percentage ? 3) To increase the revenue, should discount be offered to Toronto or Montreal or both or none