1. **State the problem:** We are given a grouped frequency distribution of social interactions over a week and asked to find the lower limit of the eighth class. 2. **Understand the classes:** Each class interval represents a range of social interactions. The classes are: 1st: 10-14 2nd: 15-19 3rd: 20-24 4th: 25-29 5th: 30-34 6th: 35-39 7th: 40-44 8th: 45-49 9th: 50-54 10th: 55-59 3. **Identify the lower limit of the eighth class:** The eighth class is 45-49. The lower limit of a class interval is the smallest number in that interval. 4. **Answer:** The lower limit of the eighth class is **45**. This is a straightforward identification from the given frequency distribution table.