03. City Taxes

function cityTaxes(name, population, treasury) {
  let cityInfo = {};
  cityInfo.name = name;
  cityInfo.population = population;
  cityInfo.treasury = treasury;
  cityInfo.taxRate = 10;
  cityInfo.collectTaxes = collectTaxes = () =>
    (cityInfo.treasury += cityInfo.population * cityInfo.taxRate);
  cityInfo.applyGrowth = applyGrowth = (percentage) =>
    (cityInfo.population += Math.floor(cityInfo.population * percentage) / 100);
  cityInfo.applyPopulation = applyPopulation = (percentage) =>
    (cityInfo.treasury -= Math.floor(cityInfo.population * percentage));

  return cityInfo;
}