Develop the activity sequence model and determine the normal time for the following work activities

1. A worker walk 4 steps, goes through a door and walk 6 steps and grasp light piece of wood.
2. He moves 6 steps to drilling machine and place with adjustment the piece of wood in the machine.
3. He presses the button to make the machine start and it takes 28 sec to drill all the holes.
4. He grasps the piece of wood after drilling and moves to the table which is 9 steps away and set on the chair and place it on the table.
5. he collects 4 screws from the pin next to him and place each screw inside the hole and it require light pressure to do so.
6. he grasps the screw driver near him and turn each screw 5 turns using wrist action. After that, he put aside the screw driver and standup and return to the drilling machine