//(1) Complete the get_csv_page function below. It takes the URL-string

//    as argument and generates a list of strings corresponing to each

//    line in the csv list. The URL url_alcohol is one possible argument.

//def get_csv_page(url: String) : List[String] = ...

//    Complete the get_csv_file function below. It takes a file-string

//    as argument and reads the content of the given file. Like above

//    it should generates a list of strings corresponing to each

//    line in the csv-list. The filename file_population is one possible

//    argument.

//def get_csv_file(file: String) : List[String] = ...

//(2) Complete the functions that process the csv-lists. For

//    process_alcs extract the country name (as String) and the 

//    pure alcohol consumption (as Double). For process_pops

//    generate a Map of Strings (country names) to Long numbers 

//    (population size). 

//def process_alcs(lines: List[String]) : List[(String, Double)] = ...

//def process_pops(lines: List[String]) : Map[String, Long] = ...

//(3) Calculate for each country the overall alcohol_consumption using

//    the data from the alcohol list and the population sizes list. You

//    should only include countries on the alcohol list that are also

//    (with the exact name) on the population sizes list. Note that

//    the spelling of some names in the alcohol list differs from the

//    population sizes list. Sort the resulting list according to the 

//    country with the highest alcohol consumption to the country 

//    with the lowest alcohol consumption.

//def sorted_country_consumption() : List[(String, Long)] = ...

//   Calculate the world consumption of pure alcohol of all countries, which 

//   should be the first element in the tuple below. The second element is

//   the overall consumption of the first n countries in the sorted list

//   from above; and finally the double should be the percentage of the 

//   first n countries of the the world consumption of alcohol.          

//def percentage(n: Int) : (Long, Long, Double) = ...