GENEVA (Reuters) – A United Nations human rights expert on Monday called on countries to take steps against Myanmar’s junta through economic sanctions and an arms embargo following the execution of four democracy activists. Myanmar’s ruling military announced on Monday it had executed four democracy activists accused of aiding “terror acts”, sparking widespread condemnation of the country’s first executions in decades. Asked in an interview what should be done in response, U.N. Special Rapporteur on human rights in Myanmar Tom Andrews said: “There are a number of options and what we need to se…