You have 5 push buttons(PB), 2 toggle switches(TS) and 1 lamp.  1. Internal relay #1 will only be energized if PB1 or PB2 is pressed at once or both at the same time while TS1 is ON 2. Internal relay #2 will only  be energized if TS2 is ON and both PB3 and PB4 are pressed at the same time 3. Internal relay #3 will only be energized if PB5 is pressed 4. The lamp will only turn ON if both internal relay 1 and 2 is energized. Once the lamp is turned ON, it will only be turned of if Internal relay #3 is energized *Special instruction, turn off TS if the program you reset the program* Make an explanation of how this works

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Latches and Flip Flop

Just like logic gates, the latches and flip-flops are the important elements of an electronic circuit. The logic gates form the important part of combinatorial circuits, while the latches and flip-flops form the essential part of a sequential circuit. Sequential circuits form the important concept of automata theory in electronics and electrical engineering, these circuits are a kind of logic circuit whose output depends on both present input and past inputs, that is, the input history.