Identify the catalyst in this reaction, explain how you know it is the catalyst, and describe how it increases the rate of the reaction

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Which substance has non polar covalent bonds