In regions far from the entrance, fluid flow through a circular pipe is one-dimensional, and the velocity profile for the laminar flow is given by u(r) = umax(1 - r 2 / R2), where R is the radius of the pipe, r is the radial distance from the center of the pipe, and umax is the maximum flow velocity, which occurs at the center. Obtain:(a) the relation for the drag force applied by the fluid on a section of the pipe of length L and(b) the value of the drag force for water flow at 20C where R = 0.08 m, L = 15 m, umax= 3m/s, and μ= 0.0010 kg/ms.