(Reuters) - Private equity firm KKR & Co said on Tuesday it had closed its latest buyout fund European Fund V, which was focused on transactions in core Western Europe markets, at 5.8 billion euros (£5.01 billion).New York-based KKR focuses on upper mid-market deals in the range of 500 million euros to 2 billion euros in equity value, with the ability to go higher selectively, like with the 6.8 billion euro deal for Unilever's spreads business.Out of the more than 140 limited partners that..