I suggest you to read OpenSSL changelogs to make it more clear. As there's not enough space to describe how it works. But heartbleed resistan version was 1.0.2, as I know.
I'm a little confused about the question, but if you're asking how many points you need to ask a question, the minimum is 10.
XLS would be it, avi contains like sounds and stuff
I believe the answer is B<span />
Nand stands for "not and". The truth table for a nand is:
a b | a nand b
0 0 | 1
0 1 | 1
1 0 | 1
1 1 | 0
Hopefully this helps you answer your question.