Design 4-bit serial adder logic module in Verilog code. In this project, you are required to design and simulate the 4-bit Serial Adder logic module. You might need to use the sequential modules. You need to design the serial adding logic for each bit, starting from LSB side. You cannot simply use the ripple carry adder logic (combinational circuit) for this assignment. Moreover, you should perform the simulation in ModelSim with two 4-bit input values (input1, input2) as (4b1001, 4b0111). Furthermore, you need to design the output result as 5-bits, which means that you need to include the final carry out bit in the result value.