1. To draw a histogram to represent the following frequency distribution:
| Class interval | \(5 - 10\) | \(10 - 15\) | \(15 - 25\) | \(25 - 45\) | \(45 - 75\) |
| Frequency | \(4\) | \(28\) | \(10\) | \(4\) | \(24\) |
The adjusted frequency for the class \(45 - 75\) is:
2. In a frequency polygon, the vertices of the polygon are drawn using class frequencies and their corresponding________ .