7. The mythical country of Traviola imposes a tax based on the number of gold tokens each taxpayer owns at the end of each year per the following schedule: Tax $100+ $5 per Token $1,000+ $6 per Token $4,000+ $7 per Token Number of Tokens 0 - 200 201 - 500 > 500 Traviola's token tax is a a. proportional tax. b. regressive tax c. progressive tax. d. value-added tax