To complete the table, here’s a breakdown of each column that we’ll need to fill out:

1. Column "x": Midpoint of each class interval.
2. Column "cf": Cumulative frequency, which is the running total of the frequencies (f).
3. Column "<cf" and ">cf"**: These typically represent cumulative frequencies below and above each class interval.
4. Column "rf%": Relative frequency percentage, which is calculated by $\frac{f}{n} \times 100$, where $n$ is the total frequency.
5. Columns "<rf%" and ">rf%"**: Cumulative relative frequencies below and above each class interval.
6. Column "fx": Product of $f$ and $x$.
7. Column "u" and "fu"**: The values for these depend on the definition of $u$, which could be a standardized or adjusted value based on the interval midpoint or other parameters.

Would you like to proceed with these calculations in stages, starting with the midpoints and cumulative frequencies? Alternatively, if you need specific parts of the table or the answers to the questions, let me know!

1. Do you need clarification on relative frequencies?
2. Would you like a breakdown of how to calculate midpoints for each class interval?
3. Should we start with finding the cumulative frequencies?
4. Do you need explanations on constructing a histogram?
5. Would you like steps on solving the mean or median using different methods?

Tip: To solve for the mean, summing up the $fx$ values and dividing by $n$ will give you the result.