Step-by-step explanation:
To accurately determine the contents of the accumulator after the second execution phase (t5), I would need more specific information regarding the context or program being executed. The term "accumulator" typically refers to a register or storage location in a computer system that temporarily holds data during arithmetic or logical operations. The specific value or contents of the accumulator at a given time depend on the instructions executed and the data processed during that phase of the program. Without additional details, it is not possible to provide a specific answer.