2. If a fast Carry Lookahead adder is to be designed. a. Define the set of modules that can be used as building blocks for such an adder. All equations should be included. b. Using these building blocks, construct a block diagram of a 16-bit CLA adder. c. Construct a table for the required number of levels and the total time delay for each of the following adders: 1. 8-bit CLA adder 2. 16-bit CLA adder 3. 32-bit CLA adder 4. 64-bit CLA adder 5. 128-bit CLA adder