Define a $4-$bit CLA using structural Verilog $($i$.$e$.,$ define a module for the bit$-$slice component and a module for the CPGN network, and then connect four bit$-$slice modules to the CPGN$).$ Simulate your circuit to verify its function, and then program it into the Boolean board. Use eight slide switches to define the inputs, and display the output on two digits of a seven$-$segment display.Please provide the verilog code in vivado $2022\mathrm{.}2$with its testbench.