[10/15/20]Complete the details of the block diagrams for the following adders. a. [10]In Figure J.15, show how to implement the “1” and “2” boxes in terms of AND and OR gates. b. [15]In Figure J.19,...

adders.

a. [10]In Figure J.15, show how to implement the “1” and “2” boxes in

terms of AND and OR gates.

b. [15]In Figure J.19, what signals need to flow from the adder cells in the

top row into the “C” cells? Write the logic equations for the “C” box.

c. [20]Show how to extend the block diagram in J.17 so it will produce the

carry-out bit c8.