
Build a combinational circuit with four inputs, in[3:0]. There are 3
outputs:

  (1) out_and: output of a 4-input AND gate.
  (2) out_or: output of a 4-input OR gate.
  (3) out_xor: output of a 4-input XOR gate.

module TopModule (
  input [3:0] in,
  output out_and,
  output out_or,
  output out_xor
);

