LUXEMBOURG (Reuters) - The Greek government must explain how it sees the next steps after Greeks voted overwhelmingly on Sunday to reject the terms of a bailout, Luxembourg Prime Minister Xavier Bettel said, voicing optimism that a solution can be found. "The Greek government has to explain how it sees the way forward, respecting European procedures. Negotiations have not become easier, but Europe is strong and I am confident that we find a solution," Bettel, whose country has just taken over the EU's rotating presidency, said in a statement sent to Reuters. ...