Asphalt at \(120^{\circ} \mathrm{F}\), considered to be a Newtonian fluid with a viscosity 80,000 times that of water and a specific gravity of 1.09, flows through a pipe of diameter \(2.0 \mathrm{in}\). If the pressure gradient is \(1.6 \mathrm{psi} / \mathrm{ft}\) determine the flowrate assuming the pipe is

(a) horizontal;

(b) vertical with flow up.