input: Write a python function to format the latitude and longitude into a string.
  assert format_latlong((40.7588972, -73.9787129)) == "Latitude: 40.7588972, Longitude: -73.9787129"
  assert format_latlong((34.052235, -118.243683)) == "Latitude: 34.052235, Longitude: -118.243683"
  assert format_latlong((51.507351, -0.127758)) == "Latitude: 51.507351, Longitude: -0.127758"
output: def format_latlong(coord):
      lat, long = coord
      return f"Latitude: {lat}, Longitude: {long}"