`timescale 1ns/1ns module data_select( input clk, input rst_n, input signed[7:0]a, input signed[7:0]b, input [1:0]select, output reg signed [8:0]c ); wire signed [8:0]data; assign data=(select[0] == 0)?((select[1] == 0)? a:(a+b)):((select[1] == 0)?b:(a-b)); always@(posedge clk or negedge rst...