TREASURY'S BAKER SAYS COOPERATION WORKING Treasury Secretary James Baker said that the agreement in Paris to cooperate in exchange rate changes showed that the process of coordination agreed to at the Tokyo summit was working. He told the House Appropriations Committee the meeting "demonstrated that the process is working." He noted that the industrial surplus countries committed themselves to strengthen their growth prospects while the deficit countries agreed to reduce their domestic imbalances. Baker said that for its part, Japan announced a cut in its discount rate to 2.5 pct and committed itself to prepare a comprehensive economic program to stimulate domestic demand after the Diet completes action on the current budget. He said the United States must also do its share pressing for reductions in the federal budget deficit through spending cuts. "And we must continue to oppose protectionist pressures," he added.