Determine which of the following indicates that a nonstationary time series can be represented as a random walk: I. A plot of the series detects a linear trend and increasing variability.
II. The differenced series follows a white noise model.
III. The standard deviation of the original series is greater than the standard deviation of the differenced series.

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers

$97520

step-by-step explanation:

add 6% to the value she got from selling the house.