If the PLC sends back to back four messages to the transformer and receives reply of first, second, third, and fourth messages after 24msec, 21msec, 19msec and 23msec respectively. What is the maximum latency in this case?

CLK Do C lo 20 D₁ C 2₁ 2₁ D₂ C 2₂ Figure 1 . Using the asynchronous ripple counter in Figure 1 and assuming that the propagation delay from an input clock to a change in the output of Q is 9ns, what is the worst-case delay (i.e. longest delay) between an input clock pulse and the counter being in a final state. Give which state(s) of the counter have the worst-case delay.

Solve number 2