Oil prices edged lower on Friday in quiet trading after three days of gains, but took support from Saudi Arabia halting crude transport through a key shipping lane, falling U.S. inventories and easing trade tensions between Washington and Europe. Brent futures were down 5 cents at $74.49 a barrel by 0319 GMT, after gaining 0.8 percent on Thursday. They are heading for a near 2 percent gain this week, the first weekly increase in four. U.S. West Texas Intermediate futures were 5 cents lower, at $69.56, after rising nearly 0.5 percent in the previous session. The contract is heading for a 1.3 percent weekly loss, a fourth week of declines. Saudi Arabia said on Thursday it was […]