Stuck in Project 3 - Operation Analytics and Investigating Metric Spike

Is there someone to guide me or make me understand about the following question mentioned below: Throughput Analysis: Objective: Calculate the 7-day rolling average of throughput (number of events per second). Your Task: Write an SQL query to calculate the 7-day rolling average of throughput. I am facing difficulty in understanding the question. if someone can help me with some more explanation.