please answer all the questions, thank you.

We define here an incrementer as a functional block that al- ways performs plus 1 operation. E.g., for a 2-bit incrementer, if the input is 01, the output should be 10. 6.A Assuming the input is X0:3, output Y0:3, write down the boolean expression for a 4-bit plus 1 incrementer. You may only use AND and XOR operators. (1.5pt) 6.B (PDF) Draw the circuit diagram for the 4-bit plus 1 incre- menter using AND gates and XOR gates ONLY. (1.5pt) 6.C (PDF) Using the above design as a functional block, design an unsigned 4-bit 2s complementor. (2pt)