The error occurs because the gate itself is expecting all its "ports" to be 4-bit wide. However, input pins X and Y, as well as the output pin, are all 1-bit wide. To fix this error, go to each pin (input and output) and change the "Date Bits" property to match that of the AND gate.

When you are done, the circuit should look like the following

Now you can play with it using the poking tool.

Enter the following as X

0011

And then the following as Y

0001

What is the output? (enter the value as displayed in Logisim)

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