C - - - - -10 -5 0 10 20 .85 .92 1 1.10 1.2 V - - - - -10 -5 0 10 25 .85 .92 1 1.10 1.25 C x - - - -10 -5 0 7 20 .9 .95 1 1.05 1.15 C h - - - 0 0 0 5 10 .9 .95 1 1.05 1.1