Table 1 Assume that Austin and Denver can switch between producing tacos and producing brownies at a constant rate. The following table shows the number of tacos or brownies each city can produce in one day (for example, Austin can produce 12 brownies or six tacos; or, e.g., six brownies and three tacos, etc.): Output Produced in One Da Brownies Tacos _- 5. Refer to Table 1. At which of the following prices would both Austin and Denver gain from trade with each other? a. 1 Taco for 1 brownie b. 1 Taco for 4 brownies c. 1 Taco for 10 brownies d. Austin and Denver would both gain from trade at all of the above prices