Well dear friend ikegami, i wanted to directly study answers of my questions...if they were solved. I have problem making conclusion about answer to questions...when i read text related to question then i think is it only the text that i need to write in answer so i asked questions here and today i was making project report so couldn't get time to study these questions.Now i am trying to conclude answers of all 19 questions one by one.Thanks for serving as helping hand and great encouragement. THANKS!