4. Calculate the bottomhole pressure for the injection of 1500 bbl/d of brine with a density of 1.08 g/cm3 and a viscosity of 1.3 cp in an 8000-ft vertical well having a surface pressure of 200 psi and (a) 2-in., 3.4-lbm/ft tubing; (b) 2 7/8-in., 8.6-lbm/ft tubing; (c) 3 1/2-inch, 12.70-lbm/ft tubing.