Oil prices fell around 4% on Wednesday on the prospect of a possible ceasefire easing supply disruptions from the key Middle East producing region after reports the U.S. sent Iran a 15-point plan to end the war between them. Brent crude futures fell $4.89, or 4.7%, to $99.60 a barrel by 0335 GMT, after declining to as low as $97.57. U.S. West…