please help on part a

4. a. The following exhibit contains data for a number of paper companies as of December 2002. Use them to estimate trailing and forward revenue, EBITDA, and P/E multiples of each company. Compute means and medians. b. Update the data and compute current multiples. Paper Industry Data as of December 2002 (Million US$ except as noted) Net Income 2002 2003 Revenue EBITDA Market Net Equity! Debt 2002 2003 2002 2003 Abitibi-Consolidated 4,374 5,770 5,321 6,421 914 1,441 Bowater Inc. 1,928 2,278 2,581 3,255 277 390 Domtar Inc. 3,356 2,655 5,559 6,031 831 1.026 International Paper Co. 16,931 11,823 24,980 26,584 3,307 3,975 Meadwestvaco Corp. 4,186 4,809 7,487 8,002 864 1,241 Packaging Corp. 1,874 688 1,761 1,903 304 381 of America Pope & Talbot, Inc. 186 226 540 589 26 52 Temple-Island Inc. 2,149 1,772 4,631 5,155 516 641 Weyerhaeuser Co. 10,070 14,041 18,551 19,018 2,265 2,560 1Shares outstanding times share price. 2Book interest bearing debt minus cash and marketable securities. 3 Canadian dollars. Source: Companies' 10-Ks and 10-Qs and Deutche Bank Securities. 194 (125) 146 548 (70) 52 221 (60) 320 914 210 108 (17) 77 173 0 158 487