A helium balloon seller wishes to have a computer program to help with her business. When someone makes a purchase, they buy spherical balloons all of the same size, and she needs to know the total volume of helium needed to inflate them all. 2 items are entered into the program - the radius of a spherical balloon and number of balloons bought. Then, your program should calculate the volume of ONE balloon. You will have to find a formula for the volume of a sphere to do this. Save the answer in a processing variable. Then, the total volume of all balloons needs to be calculated. This is easy since you know the volume of one balloon and you also know the number of balloons. This total volume of all balloons (which is the amount of gas needed) is then displayed, and that's all that is displayed, and then program stops.

Notes:
* You will find that the quantity "PI" is involved. That is a constant, and should be noted as a processing variable.
* This program has 2 inputs, 2 processing variables, and 1 output. Use short, descriptive variable names with no spaces in them now, as you are looking forward to C++ coding soon.
* Remember that a variable is either input, processing or output - can't be more than one type, so - be sure any variable is only listed in ONE category.
* To check your work, suppose someone buys 6 balloons, and the radius of each is 9 inches. The total volume is 18312.5 cubic inches.
* Keep in mind for when you turn this into a C++ program, that you have to handle decimals for some, but not all, of the data items.

3. Write up an IPO chart for this problem.


4. Type up your work in a word processor such as Microsoft Word for submission. Use the following format:

1) ...your answer, in a nice vertical (down the page) list.

Process Title
Input Variables..

Processing Variables..

Output Variables..

Algorithm..

One under the other.