HI, please give a very clear final answer that follows the description on how the final answer should look for each question

Question 1 (1 point) A Carnot engine takes in heat at a temperature of 650 K and releases heat to a reservoir at a temperature of 210 K. Determine its efficiency (percentage) . Your Answer: AnswerQuestion 2 {1 point) A refrigerator uses {5.80x10"2}J of work to remove 200 J of heat from its contents. How much heat in J must it reject to its surroundings to 3 sig. figs? Note: Your answer is assumed to be reduced to the highest power possible. YourAnswer: Answer Question 3 {1 point) A heat engine takes in {7.000x10'2) J of heat from a high temperature reservoir and produces [3.80x10"2] J of work in each cycle. What is its efficiency in percent to 3 sig. figs? Note: Your answer is assumed to be reduced to the highest power possible. YourAnswer: Answer Question 4 {1 point) A heat engine takes in {6.80x10\"2}J of heat from a high temperature reservoir and rejects {3.4x10"2] J of heat to a lower temperature reservoir. How much work {in SI units to 2 sig. figs]I does the engine do in each cycle? Note: Your answer is assumed to he reduced to the highest power possible. YourAnswer: Answer Question 5 {1 point) Some power plants extract energy from the warm ocean currents. A major disadvantage to these power plants is that O the cost of warm ocean water is quite high. 0 there is no low temperature reservoir. 0 the amount of heat released to the environment is unacceptable. O the efficiency is quite low. Question 6 (1 point) An engineer designs a heat engine using flat-plate solar collectors. The collectors deliver heat at 70C and the engine releases heat to the surroundings at (1.70x10*1)C. What is the maximum possible efficiency of this engine (percentage)? (use 3 sig. figs.) Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 7 (1 point) In each cycle of its operation, a refrigerator removes 24 J of heat from the inside of the refrigerator and releases 45 J of heat into the room. How much work in units of J per cycle is required to operate this refrigerator? Write the answer as an exact number. Your Answer: AnswerQuestion 3 {1 point] Electric heaters can operate at efficiencies very close to 100%. This does not contradict the fact that Carnot engines are the most efficient heat engines because 0 electric heaters are not heat engines. 0 electric heaters reduce the total entropy of a room. 0 Carnot engines cannot be used to heat things. 0 electric heaters have very low temperature exhaust