let () =
  let foi = float_of_int in
  Scanf.scanf "%d\n%d\n" @@ fun n k ->
  let arr = Array.init n @@ fun _ -> Scanf.scanf "%d\n" @@ fun d -> d in
  let () = Array.fast_sort compare arr in
  let g, a = n / k, n mod k in
  let big =
    (foi (Array.fold_left (+) 0 (Array.sub arr (n-g) g))) /. (foi g) in
  let small =
    if a <> 0 then (foi (Array.fold_left (+) 0 (Array.sub arr 0 (g+1)))) /. (foi (g+1))
    else (foi (Array.fold_left (+) 0 (Array.sub arr 0 g))) /. (foi g) in
  Printf.printf "%.0f %.0f\n" big small;
  Printf.printf "%.0f\n" (ceil (big -. small))