Shares of Hewlett-Packard (HPQ) were up 2% in midday trading Monday, ahead of its earnings report set for after the close Tuesday, but analysts expect slow PC sales and a slow global economy will hurt results. PC sales have suffered as consumers buy more smartphones and tablets instead. For its fiscal fourth quarter ended last month, analysts polled by Thomson Reuters expect HP to report a per-share profit of $1.14, down 3 cents from the