content: -- Problema a) ---------------------------------------
  f :: Integer -> Integer
  f n | n == 1 = 8 
      | n == 4 = 131
      | n == 16 = 16
  
  -- Problema b) ---------------------------------------
  g :: Integer -> Integer
  g n | n == 8 = 16
      | n == 16 = 4
      | n == 131 = 1
  
  -- Problema c) ---------------------------------------
  h :: Integer -> Integer -- h = fog
  h x = g (f x)
  
  -- Problema d) ---------------------------------------
  k :: Integer -> Integer -- k = gof
  k x == f (g x)
  
  
  
  
  
  