#1 I'm not sure about so I'll leave that to someone else. Some trick that is escaping me at the moment.
Apply the appropriate exponents, multiply out and use your properties of addition for logarithms to further simplify.
#3 Is where we want to use the change of base rule:
In this instance, we want to change the log base 4 and log base 8 into something that we can merge with our log base 2. Seeing as 4 and 8 are powers of 2, this seems like an appropriate way to go: