11. Vector Concatenation

How do you plan to solve it?

// Module Name: concat8_packer
// Description: Packs four inputs into one 8-bit output with specific bit mapping

module concat8_packer (
    input  [3:0] A,   // 4-bit input
    input  [1:0] B,   // 2-bit input
    input        C,   // 1-bit input
    input        D,   // 1-bit input
    output [7:0] OUT  // 8-bit packed output
);

    // Bit mapping:
    // OUT[7:4] = A[3:0]
    // OUT[3:2] = B[1:0]
    // OUT[1]   = ~C
    // OUT[0]   = D
    assign OUT = {A, B, ~C, D};

endmodule