A Carnot engine performs $1\mathrm{.}9104$J$1\mathrm{.}9104$J of work in each cycle and has an efficiency of $58\%\%.$

Part A

How much heat does the engine extract from its heat source in each cycle?

Express your answer with the appropriate units.

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Part B

If the engine exhausts heat at room temperature $(20\mathrm{.}0$C$$C$),$ what is the temperature of its heat source?

Express your answer in Celsius degrees.