Answer:
compile and analyze the data
Step-by-step explanation:
Since Peter has already identified the problem, his next step is to compile and analyze the data. This will allow Peter to see all of the data together and try to find what the cause of the problem actually is, which will ultimately allow him to develop a solution to it. This is done by inspecting and cleaning the data in order to find useful information, informing conclusions and data supporting decision-making.