Functional Near Infrared Spectroscopy (FNIRS) Data Computation

1 – why is there more or less concentration in each task
2- compare between tasks why is x task has more concentration than y task
3- compare between the average data (given) and one person data (given).
4 – use sources to support your explanation.
please use pubmed cite to find the sources
all the sources must come from pubmed or IEEE cites