A minor artery in the human arm, diameter D = 1 cm, tapers gradually over a distance of 10 cm to a diameter of d = 0.8 cm. The blood pressure (gage) at diameter D is 110 mm Hg, and at d is 85 mm Hg. What is the head loss (m) that occurs over this distance if the blood (SG = 1.06) is moving with a flow rate of 20 cm³/s and the arm is being held horizontally? Idealize the flow in the artery as steady, α = 1, the fluid as Newtonian, and the walls of the artery as rigid.