A Samuel Affum hat-trick helps Ghana reach the semi-final of the Wafu Cup after the Black Stars beat Liberia 3-0 on Monday.The win, Ghana's second in group B after an opening day win over Togo sends the Black Stars to the top of table.Ghana will now wrap up the group campaign against Burkina Faso.The eight-nation competition is constituted by countries in the sub-region and it will run till Sunday, April 18.Source: Ghanafa.org