For lab 3, you will be implementing problems from the textbook.

All problems are worth 10 points, with the exception of number 4,
which is worth 20 points.  Extra credit problems are each worth 15
points. 

Please implement coding exercises 1, 4 (make sure to do what 3 is
asking of you before adding what is wanted in 4), 6, 8, 10, 11, and 12
from the end of Chapter 3 in the textbook.  

For exercise 6, please use the complex format (a,b), where a is the
real part, and b is the imaginary part.

For extra credit, implement exercises 5, 7, and 13.

Make sure you use meaningful variable names, as well as adequate
output to indicate to the user what input is required.

Comments, style, and presentation quality count.

Please email all files to the instructor, after creating a bzip'd
tarball:

Create a directory with your username and copy all files to that 
directory. Then, from the directory  above it, execute 

tar cjvf `whoami`.tar.bz2 `whoami`

This will create a single file archive of all files, to ease
submission. Please note the quotes are backticks (next to the 1 key).