A. Ambassador Robert of State Alpha committed a very serious crime while he headed his foreign mission in the Philippines. Is he subject to arrest by Philippine authorities? Explain your answer. (3%) B. Extradition is the process pursuant to a treaty between two State parties for the surrender by the requested State to the custody of the requesting State of a fugitive criminal residing in the former. However, extradition depends on the application of two principles - the principle of specialty and the dual criminality principle. Explain these principles. (4%) C. The President signs an agreement with his counterpart in another country involving reciprocity in the treatment of each country's nationals residing in the other's territory. However, he does not submit the agreement to the Senate for concurrence. Sec. 21, Art. VII of the Constitution provides that no treaty or international agreement shall be valid and effective without such concurrence. Is the agreement signed by the President effective despite the lack of Senate concurrence? Explain your answer. (4%)