Calculate the hookload force that must be supported by the

Question

Evaluate the following problem

Problem- Consider a drill string made up two pipe configurations: an upper 10,000-ft-long steel pipe with a weight of 19.5 lbf/ft (per length) and a lower 600-ft-long dril collars keep the drill string in tension (avoiding pipe buckling) and provide downward force force/weight on the drill-bit (to break up the rock). This drill string is to be suspended (completely immersed) in an underground vertical borehole filled with a 15-lbm/gal drilling mud ("weighted" drilling fluid). The density of the steel is 490 lbm/ft³ (for both drill pipe and drill collars).

Part 1-Calculate the "hookload" (force) that must be supported by the hoisting system. [1 gal = 77/576 ft^3; 1 slug = 32.174 lbm; g=32.174 ft/s²].

I want help to determine the hookload that must be supported by the hoisting system.