Actividad 1. By a21580 Nov 20, 1985 W 1.0 Dec 9, 1987 W 2.0 May 22, 1990 W 3.0 Aug 24, 1996 W 4.0 Nov 16, 1996 W 5.0 Jan 30, 2007 W 6.0 Oct 22, 2009 W 7 Mar 14, 2011 W 9.0 Oct 27, 2012 W 8.0 Jul 29, 2015 W 10
