Upstairs I want to tell others one person went upstairs and is still there. Can I say "She is upstairs"? Is there any better way to show this person's status? Thank you!

10 count or 10 counts? Pack or Set? When I count the number of Keurig coffee, can I say: "10 counts of keurig coffee" "10 count of k-cup coffee"? Should I use counts or count here? I also feel confused about pack a set. Some paper cups sell in different packs. For example, 48 plates are a pack. Should I say, we still have 10 packs of paper plates, or 10 sets? Thank you!

How to tell people someone want to meet them? I want to tell people in the office that there is a person called XYZ at the front door want to meet them. However, I don't know how to say this in a concise and polite way. How can I start this conversation? Thank you!

Stuck I found there is a definition for "stuck" that "start doing something enthusiastically", such as "You really got stuck into your food ." When I found the fabric is caught in the machine, can I say "It is stuck in the machine"? Will it be misunderstood to another meaning?

Spin or Stir sth up? I'm wondering what is the best verb to describe the milkshake machine. Can I say "it stirs the ice cream up?" or "The machine spins very fast" ? Thank you!

Check in/ Check out I'm working on campus and I am required to write down the time I begin the work and the time I finish it. Can I say " I just checked in/out" to express that I have written the time already? Thank you.

What does "commission research" mean?

The dictionary shows "commission" means "give an order for or authorize the production of (something such as a building, piece of equipment, or work of art)." and the synonyms is "order".

When we see " How to Commission a Research", does it mean to order or authorize the third party to do the research, or to do the research by ourselves?

Thank you!