How do you plan to solve it?
module bitwise_ops_demo( input [3:0] A, input [3:0] B, output [3:0] AND_OUT, output [3:0] OR_OUT, output [3:0] XOR_OUT, output [3:0] XNOR_OUT ); assign AND_OUT= A & B; assign OR_OUT= A|B; assign XOR_OUT= A^B; assign XNOR_OUT= ~XOR_OUT; endmodule