A triple (x, y, z) of positive integers is pythagorean if x2 + y2 = z2. Using the functions studied in class, define a function pyth which returns the list of all pythagorean triples whose components are at most a given limit.  For example, function call pyth(10) should return [(3, 4, 5), (4, 3, 5), (6, 8, 10), (8, 6, 10)].  [Hint: One way to do this is to construct a list of all triples (use unfold to create a list of integers, and then a for-comprehension to create a list of all triples), and then select the pythagorean ones.   def unfold[A, S](z: S)(f: S => Option[(A, S)]): LazyList[A] =  f(z) match {       case Some((h, s)) => h #:: unfold(s)(f)       case None => LazyList() } code in scala

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