ISI PEB 2009 doubts

[dream theater]

i have doubts in questions 1,9 and 10
if someone has solved them then please help!
thank you

[onionknight]

For 10 refer : http://discussion-forum.2150183.n2.nabble.com/ISI-2010-Q-10-td7596257.html

I don't know how to do the 3rd and 4th parts of Q9.
What problem are you facing in 1?