The following information was extracted from quarterly reports for Wal-Mart Stores, Inc. (amounts in millions): Three Months Ended April 30 2011 Three Months Ended July 31E Three Months Ended October 31 2010 Operating Income Walmart U.S Walmart International... Sam's Club.... 2010 2011 2010 2011 $4,650 $4,638 $4,985 $4,879 $4,627 $4,399 1,096 459 1,095 1,415 492 1,299 1,397 390 1,223 367 429 428 The following information was extracted from the notes to the financial statements in the Wal- Mart Stores, Inc., Annual Report (for the fiscal year ended January 31,2012, amounts in millions) 15 Segments Fiscal Year Ended January 31, 2012 Walmart Walmart U.S. International Sam's Club Other Consolidated 6,214 81,364 $443,854 26,558 12,823 6,080 193,317 Operating income (loss) 1,865 (1,888) 20,367 93,050 Total assets of continuing . - operations 17 Quarterly Financial Data (Unaudited) (amounts in millions except per share data) Fiscal Year Ended January 31, 2012 Q1 Q4 Net sales Cost of sales Income from continuing operations . .. $103,415 $108,638 $109,516 $122,285 78,177 3,578 81,770 3,937 82,591 3,501 92,589 5,438 Required 1. Assess the seasonal nature of Walmart's sales and income for the company as a whole and by operating segment. 2. Assess Walmart's profitability by quarter and by operating segment