Answer Key: EV3 - Switches_Unit_Level

 1) The TRUE branch is the upper branch (with check mark). The FALSE branch is the lower branch (with "X" mark).

2) The program will check the Ultrasonic Sensor. If there is something less then 10cm from the Ultrasonic Sensor, the program will stop. Otherwise it will run for 5 rotations.

3) This program will only detect 1 obstacle and only if the obstacle is less than 10cm in front of the Ultrasonic Sensor when the program starts running.