what if i have a cold for waapa audition?

hello,

just a quick question if i have the last of a cold for the waapa MT auditions should i tell the staff before i sing, after i sing, or should i not tell them at all?

if i should tell them how should i do it i dont want to sound like im whinging or making an excuse. but i am croaky on lower notes.

was just wondering cause have heard some people say that they are not interested in stuff like colds etc...

also, anything i could do for my voice in next 3 days to help it along?

thanks for help,
ann