$ 0 0 volgens Ziyad Muslat. Thanks Juan, for the very fast reply. Ziyad Ziyad Muslat, *B.Sc.Eng, M.A.Sc <http://M.A.Sc>. Eng.* On Thu, Dec 7, 2017 at 12:22 PM, Juan Leyva (via Moodle.org) <