Help again Linux CLI: Ep.16 – Combining Commands

I feel like I'm banging my head against the wall with the last 2 questions of this lab. I've been stuck on question 5 for the grep command. Any hints of what am I doing wrong? missing? 

And then the last question to run sleep. Huh? Is there a command to combine with the sleep 600? 

Any help would be appreciated. So I can finally do the last lab for Linux. =)