As blood moves through a vein or artery, its velocity v is greatest along the central axis and decreases as the distance r from the central axis increases (see the figure below). For an artery with radius 0.1 cm, v (in cm/s) is given as a function of r (in cm) by v=g(r) = 18,500(0.012). (a) Find g-1, g-(v) = What does g1 represent? O g represents the velocity of the blood in the vein or artery at time t. O g-1 represents the velocity of the blood in the vein or artery with radius r. Og represents the length of the vein or artery that contains blood with velocity v. g represents the radial distance from the center of the vein or artery that contains blood with velocity v. Og represents the amount of blood passing through the vein or artery in time t. (b) Find g(25). (Round your answer to three decimal places.) g-(25) =