The volume flow rate in an artery that supplies blood to the brain is 3.20 ✕ 10−6 m3/s. If the cross-sectional area of the artery is 8.90 ✕ 10−5 m2, what is the average speed (in m/s) of the blood through this vessel? Answer: 3.60X10^-2, but I can't figure out the second part : Find the average blood speed (in m/s) through a narrowed section of the artery where the cross-sectional area is reduced by a factor of 5.

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