These are the ones I am having trouble figuring out. Thank you.

I need some help with IUPAC naming. There are 7 problems on the attached sheet. These are the ones I am having trouble figuring out. Please try and give explanations to help me learn. Thank you.1)2)IUPAC name:_______________________3)IUPAC name:_______________________4)IUPAC name:_______________________draw structures for the following names:5)