[5] The answer will be [5]. The program creates a graph by using source operations. These source operations will pass their information to other operations which will execute computations. Here in order to create two source operations which will output numbers, two constants are defined in a and b. After that, function tf.add() adds two elements and stores the calculation in c. The with block then prints the result by opening the session. After running the with block, session will close automatically.