Given the following data Drawworks horsepower =1,200 hp Hook load 250,000 lb Number of lines strung = 8 Sheave efficiency = 96% Drilling line breaking capacity When pulling out of the hole, calculate: a) Hook load shown at the weight indicator (lbf) b) Block-and-tackle system efficiency (%) 100,000 lbf c) Time (in seconds) to hoist one stand (90 ft) at maximum DW power d) Drilling line safety factor in use