i need help with the parts marked in green. thank you

2) Constructing a 2-bit full-adder: 1 - Constructing a 2-bit full adder will require XOR, OR, and AND gates. Obtain a 74LS86 XOR chip, one 74LS32 OR chip, and a 74LS08 AND chip from the logic parts kit. Plug them into the board. Remember: DO NOT PLUG IN TWO LOGIC CHIPS ACROSS FROM EACH OTHER ON ADJACENT VALLEYS! YOU AUTOMATICALLY ? CONNECT ALL ADJACENT PINS TO EACH OTHER WHEN YOU DO THIS. - The gates should be connected as follows (make sure power is off at this point): 3. ALSO REMEMBER TO CONECT POWER INPUTS TO EACH CHIP! 4. Note that the XOR, AND, and OR gate make up the full adder circuit for each of the two bits. Inputs A1-A2 (number 1) and B1-B2 (number 2) should be connected to four of the data switches. A fifth data switch should be connected to Carry In. Note that A1 and B1 are the LSBs of the numbers, and A2 and B2 the MSBs. The Sum 1-2 and Carry Out should 5. Check all connections and then turn on the powere that switches are in the low ( 0 ) position. Now turn on B1 and note that Sum 1 goes off but Sum on A1 and note Sum 1 light up. (Carry 1) has propagated to the Bit 2 sum and made the outpon. This means that the carry on the A2 and B2 switches and note that Carry Out now output of the adder binary 2 . Turn added make a sum of 4 , and our adder only has a 2 -bit sum turns on (since the two 2s being maximum of 3 ). 6. Experiment with the adder until you are comfortable with it. Then complete the following additions, noting what sum lights are on, and whether the Carry Out light is on: 1+2+ carry, carry +3+1, carry +3+3,2+2+ carry. Tabulate results and discuss in the project summary. 3) But can ir Sing the information provided in Lecture #4, redesign the adder to add or subtract two cositive 2-bit numbers and provide the proper sign as required. Assume that there is no "carry in" to the least significant of the two bits, so that the LSB carry-in may be used to help construct the subtract function. Have the TA verify your circuit functionality. Then verify subtraction of the following numbers: 31,32,21.20 7. Laboratory Report: As usual, please follow the laboratory report form. In your write-up, discuss the operation of the circuits and the verification of the function of each. Also include the following items: - Discuss your experience in the laboratory and any problems with the procedure. - Make a drawing for a 1-bit full adder without using an XOR gate. How much more complicated is this adder? - Show the truth table of the 2 -bit adder for the cases listed in part 2 of Section 5. - Make a drawing of the 2-bit adder/subtractor you designed in part 3 of Section 5