The 74LS181 is an ALU chip with the following function table. Input A, input B, and output F are 4-bits each. (a) Write VHDL code to implement the logic functions of the chip. You are free to select any VHDL design style i.e. Dataflow, structural, behavioral or mixed. (b) Write VHDL code to implement the arithmetic functions of the chip. You are free to select any VHDL design style i.e. Dataflow, structural, behavioral or mixed. ACTIVE-LOW DATA SELECTION M = H LOGIC FUNCTIONS M = L; ARITHMETIC OPERATIONS Cn = L Cn = H (no carry) (with carry) F = A MINUS 1 F = A S3 S2 S1 SO L L L L F = A 1 L L H F = AB MINUS 1 F = AB L L H L F = AB F = A +B F = 1 L L H L L H L F = AB MINUS 1 F = AB F = MINUS 1 (2's COMP) F = ZERO F = A PLUS (A + B) F = A PLUS (A + B) PLUS 1 F = AB PLUS (A + B) F = AB PLUS (A + B) PLUS 1 F = A MINUS B MINUS 1 F = A MINUS B L H L F = A +B F = B F = A B F = A + B H L H H L L H H H H L L L H L H L H F = AB F = A B F = B H L L F = A +B F = A PLUS (A + B) F = A PLUS B F = AB PLUS (A + B) F = (A + B) F = A PLUS A F = AB PLUS A F = (A + B) PLUS 1 F = A PLUS (A + B) PLUS 1 F = A PLUS B PLUS 1 F = AB PLUS (A + B) PLUS 1 F = (A + B) PLUS 1 F = A PLUS A PLUS 1 F = AB PLUS A PLUS 1 H L H H F = A + B F = 0 H H L L H H L H F = AB F = AB H H H L F = AB PLUS A F = A F = AB PLUS A PLUS 1 F = A PLUS 1 H H F = A