B. Design a combinational circuit that describes the quadruple 2X1 multiplexer using a behavioral model. Develop and simulate a behavioral model (dont use the data flow model for this component). C. Design a combinational circuit for BCD adder. See Figure 4.14 of the textbook for the whole design of the BCD adder. Develop and simulate a data flow model (dont use the behavioral model for this component) for the BCD adder

B, B, B, 2 Mode - 0 FOR A Mode = 1 for Sub 9's Complementer (See Problem 4.18) Select Solo Omadruple 2 x / MUX Select 4, 4, 4, 4, C BCD Adder (See Fig. 4.14) Figure 1 BCD adder-subtractor circuit