It's for a learning leader position (students helping students learn) on one of the units I have already studied at uni. The interview is on Thursday and I need to prepare a 5 minute presentation. Can anyone help me please with the following?

1) It says for the presentation - no need for power point. Does this mean you don't have to use powerpoint, or does it mean do not use powerpoint?

2) what to wear? I am assuming formal as in an office job interview would be too much, but would denim be too relaxed? I could go with leggings and a floaty skirt, plus a t-shirt but that would show off a heap of my tattoos - would that be ok for an interview? Normally I would hide them but this is for a peer position dealing with students so it might be ok? But then again it is a paid position so should I be a bit more formal??? Help!!!