[blhack]

I'm kindof confused: do you want us to write actual code? Just give an explanation of how to do this?

If the former: what language, what assumptions can we make about the environment?

[rajatsuri]

for q1 - submit an answer and explain how you got there (with whatever code you wrote, if any)

for q2 - just the answers are sufficient

for q3 - submit an explanation of how you'd tackle the problem, or code