a) Design an 8-to-1 multiplexer using 2-to-1 multiplexers (tree structure). Provide truth table, logic equation, block diagram and circuit diagram. b) Write Verilog code, using ifstatement to implement the 8-to-1 multiplexer of a). c) Write Verilog code, using case statement to implement the 8-to-1 multiplexer of a)