[Haskell-beginners] haskell scheduling

Hi Hope that You are doing fine. I am stuck at this problem if you have any idea kindly help me out. I want to output the schedule for a given task and method for one hyper period....like (o, just (T4 3 1 3 1), (1, Just (T2 5 1 51) etc Regards Nowshad data Task = T4 Phase Period Execution Deadline | T2 Period Execution deriving (Show ,Eq) type Phase = TimeUnit type Period = TimeUnit type Execution = TimeUnit type Deadline = TimeUnit type TimeUnit = Int data Method = RM | DM | EDF deriving (Show , Eq) periodicSchedule :: Method -> [Task] -> [(TimeUnit, Maybe Task)]