parvathy, please make sure that you have read our rules. Your first two threads were a crosspost and rule 4 says:
(4) Do not 'bump up' questions if they are not answered promptly. No duplicate or cross-posting and do not report a post where your goal is to get an answer more quickly.
And this question does look like a homework question which is also against the rules. But I'm not sure. Still, blowtorch, homework or no, if you want to give a few hints, go ahead.