Consider a system that undergoes the following:
• The system does 15 J of work when 50.00 J of heat transfers to the system.
• Later, 30 J of heat transfers out of the system while 6 J of work is done on the system.
What is the net change in internal energy of the system?
A. 9 J
B. 11 J
C. 15 J
D. 59 J
E. 101 J