any number please

2. Represent the decimal number 6514 in (a) BCD; (b) Excess-3; (c) a 6311 code. (10%) 3. Represent the unsigned decimal numbers 694 and 538 in BCD, and then show the steps necessary to form their sum. (596) Show the signals of the outputs c and d in logic circuit Fig._A, for using all four possible combinations of input a and b. (5%) 4. 5. Show the truth table for all generated functions of two binary variables. (10%)