Final answer:
The question regarding the number of seats in a school hall and rows behind a specific seat requires additional information not provided, making it impossible to give an accurate answer.
Step-by-step explanation:
To determine the total number of seats in the school hall and the number of rows behind G7, we need additional information that is not provided in the question. Without specific details, such as the number of rows, the number of seats per row, or the arrangement of the seating, it is not possible to accurately answer these questions. A common way to solve this type of problem in mathematics is to use patterns or formulas based on the information given about the seating arrangement, but here we simply lack the necessary data.