Amplitude and period help, PLEASE?

Question

Okay so the equation is simple

y= 3sinx

but I have a problem in writing down the period part.

Our teacher said it was up to 2 Pi

The thing is I start from:

Pi/8, Pi/4, 3Pi/8 and 2Pi

she keeps telling me that it's correct but at the same time I need to like.. divide like Pi/4 divided by 2 or something so I can get the correct measurements between in the period.

I have no idea what the heck she's saying cause well she is such a hard teacher to understand. Please, help someone

Answer 1

????? x 222