Tree Branching

I am just learnign grasshopper I started yesterday and I would greatly appreciate any help i could get.  currently I have two problems

the first is i have a boolean list and i need to split it into two lists one with only trues

and the other with only false or i just need to count the number of trues and the number of falses.

the other is i have a branching list and i one to get first the branch and then an element from the branch and i am not sure what utility i need to use in order to do that.  List item only lets me enter an integer.  Thanks so much!

Carl