2000 Other Nissan Models Nissan Micra 1.0 s Automatic 2000 x

Hi there I have a Nissan Micra 1.0 s Automatic 2000 x reg. I would like to ask 2 questions about my car.

firstly on the transmission stick it has a sprts mode button onit, is the sports mode activated when its in or out? Or when the light come son the dash or of? I do not have the manual to check this.

second question is that it is drinking a bit of petrol that I have realised. £20 fuel only lasts me about 2 - 3 daysish. Why could it be dringing more fuel?

look fowrd from hearing from you guys?

Regards
Adam