A Power-Law fluid is being pumped through a drillstring consisting of drillpipes + bit. The well trajectory is shown in the figure: vertical and cased at 7,500 ft and inclined open hole (45 deg from vertical) up to 12,000 ft (measured). Given the following data: Last Casing shoe depth Last Casing ID 7,500 ft 8.681 in. Bit size Bit jets DS geometry 8.5 in. 3 x 13 DP OD 5 in. DP ID 4.276 in. 7,500 ft (MD) Mud data Flowrate 400 gpm Mud density Fann reading @ 600 rpm 12 ppg 80 Fann reading @ 300 rpm 51 Fann reading @ 100 rpm 24 Fann reading@ 3 rpm 6 12,000 ft (MD) Use API 13D (2003) to determine friction losses. Considering that the friction losses are the same regardless the direction of flow, determine the following: a) Surface pump pressure b) ECD at bottom (direct circulation: surface-inside pipe-bit-annulus - surface) c) ECD at shoe (direct circulation) d) ECD at shoe (reverse circulation: surface annulus bit inside pipe surface)