code: def sum_stats(stats_data):
      
      t_bounces = 0
      t_complaints = 0
      t_delivery_attempts = 0
      t_rejects = 0
      for dp in stats_data:
          t_bounces += int(dp['Bounces'])
          t_complaints += int(dp['Complaints'])
          t_delivery_attempts += int(dp['DeliveryAttempts'])
          t_rejects += int(dp['Rejects'])
  
      return {
          'Bounces': t_bounces,
          'Complaints': t_complaints,
          'DeliveryAttempts': t_delivery_attempts,
          'Rejects': t_rejects,
      }
docs: Summarize the bounces, complaints, delivery attempts and rejects from a
      list of datapoints.