answer all parts please

(5%) Problem 7: Mountain climbers carry bottled oxygen when at very high altitudes, since the atmosphere contains less and less as you go higher up. Forbes, David - david.forbes@doane.edu @theexpertta.com - tracking id: 9N69-72-B9-45-AB7A-35266. In accordance with Expert TA's Terms of Service, copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. A 33% Part (a) Assuming that a mountain climber uses 3.92 liters of oxygen per minute, calculate how many liters of oxygen a climber would need for 9.5 h of climbing. (These are liters at sea level.) Note that only 40% of the inhaled oxygen is utilized; the rest is exhaled. Grade Summary VO = 1 Deductions 1% Potential 100% sin() cosO tan() 7 8 9 HOME Submissions asin() acos() E Attempts remaining: 1 cotan() 4 5 6 (71% per attempt) atan acotan() sinhO 2 3 detailed view cosho tanh( cotanh() + 0 END Degrees O Radians VO BACKSPACE CLEAR Submit Hint Feedback I give up Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback. 4 33% Part (b) How much useful work does the climber do, in joules, if he and his equipment have a mass of 82.5 kg and he gains 950 m of altitude? 4 33% Part (c) What is his efficiency for the 9.5-h climb? Assume his total energy consumption is 1370 W