(Solved): class Duration: def __init__(self, hours, minutes): self.hours = hours self.minutes = minutes def __ ...

class Duration: def __init__(self, hours, minutes): self.hours = hours self.minutes = minutes def __add__(self, other): if not isinstance(other, Duration): return 'oops' total_hours = self.hours + other.hours total_minutes = self.minutes + other.minutes if total_minutes >= 60: total_hours += 1 total_minutes -= 60 return Duration(total_hours, total_minutes) one_way_time = Duration(1, 49) round_trip_time = one_way_time + one_way_time print(one_way_time + 33) print(round_trip_time.hours, round_trip_time.minutes)