This is correct. Exercises are not consistent. Sometimes the command is desired and sometime not.....
hele is just the word meaning "(to) go" but E hele! Is a complete sentence, a command, meaning Go!
Hmmm. Ditto others above. If not consistent in these beginning exercises ... are the more complex exercises reliable in the correctness of the answer? Hope this gets corrected soon as the lessons progress.
Option two for me was "Ub40 'oe!" Is this a mistake or a sound notation I haven't come across before?
Report it, please. It appears someone has accessed the system and is playing around.