FIG. 8B
TOP AVERAGE OF LINES A AND C
BOT —- AVERAGE OF LINES B AND D
TOP - AVERAGE OF LINES E AND G
BOT AVERAGE OF LINES F AND H
TOP —- AVERAGE OF LINES I AND K
BOT AVERAGE OF LINES J AND L
TOP AVERAGE OF LINES M AND 0
BOT AVERAGE OF LINES N AND P
TOP AVERAGE OF LINES R AND T
BOT —- AVERAGE OF LINES Q AND S
TOP AVERAGE OF LINES V AND X
BOT AVERAGE OF LINES U AND W
