I assume that QueueInsert inserts the first argument at the "end" of the queue, GetQueueFront returns the "front" element without changing the queue, and that QueueFront is the variable in which that element was returned, and that QueueDelete removes the "front" element. Then we get:

Q:

T:

Q.QueueInsert(1,success);

Q.QueueInsert(2,success);

Q: 1, 2

T:

T.QueueInsert(3,success);

T.QueueInsert(4,success);

Q: 1, 2

T: 3, 4

Q.GetQueueFront(QueueFront

Q: 1, 2

T: 3, 4

and QueueFront is 1

T.QueueInsert(QueueFront,s

Q: 1, 2

T: 3, 4, 1

Q.QueueDelete(success);

Q: 2

T: 3, 4, 1

T.QueueInsert(5,success);

Q.QueueInsert(6,success);

Q: 2, 6

T: 3, 4, 1, 5

That differs somewhat from your answers, and the difference looks like it is connected to the interpretation of what Q.GetQueueFront(QueueFront