Epiphone volume and tone controls

Question

Hi,
I am new to guitar and have an epiphone Sheraton guitar with 4 controls, I assume 2 for volume and 2 for tone. I think something is wrong with them, can you tell me which ones are the volume and which ones are the tone and which pickup do they control? Sorry for the dumb question but I can't figure this out. I would REALLY appreciate an answer to this.

Thanks.