Extracted text: Q3: The following values represent the nitrate concentrations in amalgam per liter for 24 samples taken from a specific section of the Tigris River for several months: 51,67,63,60,75,94,91,93,87,56,23,108,72,62,35,36,15.33,12,100,102,103, 73,61. A- Organize a frequency distribution table explaining each of the limits of the classes, their frequency, mid class and class boundary limits, so that the limits of the first Class are 10-19 B- Draw the histogram C- What is the number of samples in which the nitrate concentration does not exceed 30 mg / liter? What is the number of samples in which the nitrate concentration is less than 100 mg / liter and more than 60 mg / liter?