GIVEN As shown in Fig. E$8\mathrm{.}9$a$,$ crude oil at $140F$ with $=53\mathrm{.}7l\frac{b}{f}{t}^3$ and $=8{10}^{-5}lb*\frac{s}{f}{t}^2($about four times the viscosity of water$)$ is pumped across Alaska through the Alaskan pipeline, a $799-$mile$-$long, $4-$ft$-$diameter steel pipe, at a maximum rate of $Q=2\mathrm{.}4$ million barrels $\frac{?}{?}$ day $=117f\frac{t^3}{s}.$

FIND Determine the horsepower needed for the pumps that drive this large system.