If you have a sample set of data that looks to be a realization of an inte grated process of order 2, what would you do to the data in order to mod el it? (2 Marks)

\( \frac{2}{3}\left(\frac{3}{5}-\frac{3}{4}\right)+\frac{1}{2} \div \frac{1}{4} \) Step \( 1 \div \frac{2}{3}\left(-\frac{3}{20}\right)+\frac{1}{2} \div \frac{1}{4} \) Step \( 2:-\frac{1}{10}+\frac{1}{2} \div \frac{1}{4} \) Step \( 3:-\frac{1}{10}+\frac{1}{8} \) Step \( 4: \frac{1}{40} \)

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3. (30 points

4. Söz vermak, işara vermak, ad-san qazanr ifadələrindən hansılarında feil məcazi mən işlənib? (st. 2.1.2.)

The ratio of Ali's age to his father's age is \( 1: 4 \) now. In 5 years' time, their tal age will be 70 . How old is Ali now?