I want to verify if "forward momentum in a crash is reduced by roughly $60$percent for the rider in an airbag vest or jacket, and head trauma is reduced by approximately $80$

$$percent$."$ is true. Please give assumptions and calculations to verify if the statement is true. Use HIC and relavent calculations. Write few paragraphs in the conclustion. Also, use appropriate AIS codes for each parts of the body. Please assume reasonable numbers and calculate the result