Which of the following does list all the true statements below?

I. There are four sources for packet delay.

II$.$ The four sources for delay are nodal processing delay, queueing delay, transmission delay, and propagation delay.

III. Queueing delay depends on the time waiting at output link for transmission and congestion level of router.

IV$.$ Transmission delay depends on the packet length and link transmission rate.

V$.$ Propagation delay depends on the length of the physical link and propagation speed.