Design, simulate and synthesize a 16-bit integer multiplier using only one 4-bit adder. This 4-bit adder is to be made with four 1-bit adders as components. The coding is in VHDL.-Design, simulate and synthesize a 16-bit integer multiplier using only one 4-bit adder. This 4-bit adder is to be made with four 1-bit adders as components. The coding is in VHDL.