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Need help on Hw Locker problem

So yeah.. I need help on this. It's Sophomore homework, but it's a little bit "confusing"
It's Geometry work so yeah
Here goes ;D

One hundred students are assigned lockers 1-100. The student assigned to locker 1 opens all 100 lockers. The student assigned locker 2 then closes all lockers whose numbers are multiples of 2. The student assigned to locker 3 changes the status of all lockers whose numbers are multiples of 3 (e.g. locker 3, which is opened gets closed, locker 6, which is closed, gets opened). The student assigned to locker 4 ch@nges the status of all locker whose numbers are multiples of 4, and so on for all 100 lockers.

1. Which lockers will be left open?

2. Explain how you determined that these particular lockers will be open.

3. What do you notice about these particular locker numbers?

4.Why are these specific locker numbers still open?

5.How many lockers, and which ones, were touched exactly twice? How do you know?

6. Which students touched both lockers 36 and 48? How do you know?

7. Which locker was switched most times? How do you know?

Yes, I already googled/youtube it, but im wondering if any if u guys done it before because I have to make a poster/powerpoint to present it. I'm sorry for being a lazy jerk off for not doing it my own, but im confuzzzledd

thanks <3