i want the answer for part b only !!!

Question 1 a) Develop the activity sequence model and determine the normal time for the following work activities: 1. A worker sitting on chair stands up walk 10 steps toward an old cabinet. He open the old drawer and he face some resistance because the drawer is kind stuck. 2. He collects 5 screws from the drawer and returns back to his chair and set down. 3. He inserts with adjustments the 5 screws in each hole in laptop in front of him. 4. He picks up the screwdriver laying aside next to him and turns each screw X times. After he is done, he performs Y(unknown) body motion put the screwdriver next to the laptop. No. Method Description Action Sequence Model 1 General ABG ABP TMU A Move Control ABGM X 1 A Move Tool Use ABG ABP . A B P A 2 General ABG AB P A Move Control ABGM XIA Move Tool Use ABG AB P General ABG AB P A Move Control A B 6 1 Move Tool Use A B G A B P 4 General ABG A Move Control ABGM X 1 A Move Tool Use ABG ABP. Total TMU - b) If the total TMU is 1640 which one of the following is true. "Hint chose the answer that is close to your value if not exact." (Show your work) X-9 turns and Yis no body motion X=3 turns and Y is sitting down X=3 turns and Y is standing up . X-5 turns and Y is standing up