Experimental testing of artificial grafts placed on the inner wall of the carotid artery indicates that blood flow through the artery at a given moment has a velocity profile that can be approximated...

Experimental testing of artificial grafts placed on the inner wall of the carotid artery indicates that blood flow through the artery at a given moment has a velocity profile that can be approximated by u = 8.36(1
 r/3.4)^1/n
mm/s, where r is in millimeters and n = 2.3 log₁₀
Re
4.6. If Re = 2(10⁹), plot the velocity profile over the artery wall, and determine the flow at this instant.