Exercise-set #3 - All from 9 and last from 10

[Rama]

Dear Class,

Please attempt to solve the attached exercise set before 6/11/2011.

After completing the exercises, please scan the solution and
work-sheet (the paper where you did all the steps) and email them to
me before 6/11/2011.

You could send your emails with attachments to mail...@gmail.com.

Regards,
Rama

PS: I am aware that I was a little late in posting the exercise set,
so do your best to solve them on time.