1

bc2 - b1c1

c2 c2 c2

c1 c1 c1

c1 c2

i c4

Z = -1 + -[b1 loge (R + c1) + (t - b1) loge (R + <4) a

The value of Z for each of these three sections may be found from the expression above by making h h h

0 0

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