When using Hammer, we have the following limitations that don't exist in the real world. Select all that are true. We can only create rectangles in Hammer. If the robot strikes a Duplo block, it will stop moving and the program will stop running. We can't account for sensor variability or bias in Hammer. We can't hear the robot "beep" on Hammer. If the robot strikes a Duplo block, it will stop moving but the program will continue running. We can't account for motor variability or bias in Hammer. We can have only one robot present in Hammer