Prelab: Given the following circuit use the techniques covered in class to convert it to multi-level NAND and also multi-level NOR. Use the techniques discussed in Chapter 7 to select the "best" option. Record the VHDL statements needed to implement this circuit using assignment statements. Find three online sources for the required gates in your solutions and use the average price for all cost related decision criteria. Be sure to document the sources and prices. Assume that propagation delay may become a problem as you approach a circuit with 5 or more levels, however cost is very important. U1A 7408N U2A U1C 7432N U2B 7408N U1B 7432N 7408N