What in the world is SIGMA notation?!

This notation is used all the time in Physics and Math to represent the sum of a series of numbers.
The numbers can be as simple as 1 + 2 + 3 + 4 + 5 + ... + n,
or, in the case below, a little more complicated: 1 + 4 + 9 + 15 + ... + n^2

Write the following in Sigma notation, then write the VPython code to calculate the sum, then run the code to get the result.

(The first one is done for you..................................)

(1) Write the sum:  1 + 2 + 3 + ... + 10

IDLE 2.6.2

>>> count = 0

>>> for j in range(1,11):

        count += j

>>> print "the sum is: ", count

the sum is: 55

(Now, it's your turn....................)
(2) Write the sum:  1 + 2 + 3 + ... + 100
(3) Write the sum:  1 + 3 + 5 + ... + 99
(4) Write the sum:  1 + 2 + 4 + 16 + ... + 512
(5) Write the sum:  1 + (1/2) + (1/4) + ... + (1/1024)

Questions? send them to Dr. McCarthy ASAP.  Good luck.