Blood floves at an average speed of 0.40 m/s in a horizontal artery of radius 10 cm. The average pressure is 1.4 x 10 N/mm² above atmospheric pressure (the gauge pressure). (a) What is the average speed of the blood past a constriction where the radius of the opening is 0.30 cm? (b) What is the gauge pressure of the blood as it moves past the constriction?