Please solve these question in details and fully explaination. Thanks so much in advance. It is "Charges and Force" Question.

1. Static Electricity , as a precaution , the levers on gasoline pumps in many provinces in Canada must be manually operated at all times.' One of the reasons for this is especially relevant in the winter time because the fabrics used for heavy clothing and coats make it easy to build up a static electric charge . Explain why it could be dangerous to allow someone to have the gas continue pumping while they are doing something else, imagine what might happen when they come back and touch the pump. 2 . Consider a solid object that carries a net posibre charge : to acquire that positive charge , are protons added to it , are elections removed from it , on does that vary from case to case ? Hint , think about atomic structure , in particular what the number of photons and elections in an atom signify . 3. Materials in which electrons move freely are called conductors , whereas materials in which elections are stuck in place are called insulators . Is it possible to electrically charge both kinds of material : Explain and provide one example for each . 4 . An insulator can often acquire a net charge by rubbing it against another insulating material : one such example is when a plastic lod is subbed against a piece of fur . Could a metal zod by charged by the same techiniqhe . " Explain why on why not