Input range of integral and number of sections
Show results for all of the methods we discussed in lab:
Riemann Low
Riemann High
Trapezoidal
Simpson's 1/3
Create a sub-function for calculating the equation for given x-values like we did in the lab
Create a sub-function for calculating the integral for each method for the equation and range/section.
This will result with one main function for user input and results output and then five sub-functions.
Output results to the screen