In this part of the tutorial on line 5 I get an error that states Landmark does not conform to protocol "Encodable" also does does not conform to protocol 'Decodable', 'Equatable' or 'Hashable'. I can not get past this part in the tutorial. Also on line 29 I get an error can't find type 'Coordintates' in scope. Anyone have any answers. Thank you.