Name: Trapezoid Area
Version: 1.1
Author: Nishad Phadke (nishad.phadke@hotmail.com)
Date: May 28, 2011
Tested on TI-89 HW 2.00 OS 2.09.

Documentation:
1. Type the name of the function.
2. Enter the lengths of the four sides of the trapezoid as arguments with argument1 being the smaller base and argument3 being the larger base (**Especially important).
3. Obtain the area of the trapezoid.