A system experiences a change in internal energy of -36 kJ in a process that involves a transfer of 14 kJ of heat into the surroundings. Simultaneously, which of the following is true?
a. 22 kJ of work is done by the system.
b. 22 kJ of work is done on the system.
c. 50 kJ of work is done by the system.
d. 50 kJ of work is done on the system.