Hi Paul,
It appears you didn't copy/paste the entire command from the task. Please activate a new sandbox, then when it is ready click the Copy button on Task 1 -- Step 1 and paste it into the cloud shell window on the right, and press enter. Once the command has completed go ahead and do the same thing for Task 1 -- Step 2.
Please click Accept Answer if the above was useful.
Thanks.
-TP