German carmaker BMW reported a 26.4% drop in first-quarter net profit to €2.2 billion ($2.5 billion), as weak demand in China weighed on earnings. German carmaker BMW reported a 26.4% drop in first-quarter net profit to €2.2 billion ($2.5 billion), as weak demand in China weighed on earnings. Revenues fell 7.8% to €33.8 billion as…