i need an professional work in physics lab homework

the experiment in the lab called " the slide wire potentiometer "

i did the lab in the class and i wrote all the data sheet for the experiment but at the end there are a few question that is need to be answered and its related to what i did in the experiment but kind of conceptual . i need an expert to solve these questions for me within 2 hours they are only 6 questions. ( in the attachments )