Hello, can you help me with these questions(especially 2 and 4)? Thank you!

2) Acid / Base reactions with NaOHl orticl and unknownd (example with Unknowh A) +NaOH +HCl 3) Mechanism of positive con trol (cycloherene) with Brz. 4) The silver nitrate test is a sobstitution reaction. when you used 2 -chloromethyl propane, was the reaction likely shllor Sn 2? Drau out mechanism. (The sucleophile is: ONO2 )