1. What are the equations to retrieve the sum() and the carry output (Cout) of a full adder? 2. How many full adders are needed to complete these additions? a. 101 and 010 b. 1100 and 0101 c. 111 and 001 d. 1010 and 1101 e. 010 and 011 f. 11001 and 10101 3. For Question 3 (Show your workings): a. Draw the block diagram of parallel adders for Question 3 b. Get every instance of sum () and carry output (Cout) for each full adder. c. Get the results. 4. Use the parallel adder truth table (Table 1) to find the sum and output carry for the addition of the following two 4 bit number if the input carry (Cn1) is 0 . Show the diagram. X4X3X2X1=1101Y4Y3Y2Y1=0101 Table 1