- Construct a table that gives the on-off status of each transistor in the circuit above for all combinations of inputs A and B.
- Compute the output, Y, for each input combination and describe the function of the above circuit.

2. The output Y is connected to four pairs of transistors in series, so each of these pairs can affect the output.

- when A=0 and B=0, transistors T4 and T5 are on, so Y=0
when A=0 and B=1, transistors T6 and T7 are on, so Y=1
when A=1 and B=0, transistors T2 and T3 are on, so Y=1
when A=1 and B=1, transistors T8 and T9 are on, so Y=0

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