QUESTION 16 Which of the following statements is correct? a. Weakly dependent processes are said to be integrated of order one, or I(1). b.Unit root processes, such as a random walk (with or without drift) are said to be integrated of order zero, or I(0). c. The first difference of a time series that is I(1) is weakly independent (and often stationary). Thus, when we suspect processes are I(1), we often first difference in order to use them in regression analysis. d.All of the above.

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A:

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.