Make FetchWeatherTask accept a vararg of Strings as the first parameter. We use this to now change FetchWeatherTask to accept a postal code as a parameter. Instead of a predefined Url to call the OpenWeather API with specific parameters, we now use a base Url for OpenWeather and build a new specific Url by appending parameters to it. The only parameter we are using now is the postal code. The user still cannot change the postal code yet but these changes to FetchWeatherTask will allow us to do that.