Oil at 80F ( = 56.8 lbm/ft 3 and = 0.0278 lbm/fts) is flowing steadily in

Oil at 80°F (ρ = 56.8 lbm/ft³ and μ = 0.0278 lbm/ft·s) is flowing steadily in a 0.5-in-diameter, 175-ft-long pipe. During the flow, the pressure at the pipe inlet and exit is measured to be 80 psi and 14 psi, respectively. Determine the flow rate of oil through the pipe assuming the pipe is

(a) Horizontal,

(b) Inclined 20° upward,

(c) Inclined 20° downward.