A price-weighted series is composed of the following three stocks:

A．stock

B．number of shares outstanding before stock split

C．market price before split on day 1

D．market price after split on day 3

E．

x

y

Z

F．

1000000

5000000

4000000

G．

$10

$20

$60

H．

$12

$19

$22

某滞洪区滞洪后沉积泥沙层厚3.0m，地下水位由原地面下1.0m升至现地面下1.0m，原地面下有厚5.0m可压缩层，平均压缩模量为0.5MPa，滞洪之前沉降已经完成，为简化计算，所有土层的天然重度都以18kN/m³计，试计算由滞洪引起的原地面下沉值。

现有土自重应力-原有土自重应力=新增附加压力