Oil prices slid on Tuesday from their highest levels in a month on a stronger dollar and after the head of the International Monetary Fund warned of a tougher 2023 as major economies experience weakening activity. Brent crude futures dropped 98 cents, or 1.1 per cent, to $84.93 a barrel by 0148 GMT while US West Texas Intermediate crude was at $79.49 a barrel, down 77 cents, or 1pc, after the U