Create a program to offer the user a choice between the 6 conversions you programmed into the moles module. Do this by:
1. Create a function to read user input passing the prompt as an argument and returning the number supplied.
2. Create a menu display for the user to see and choose from.
3. Ask the user to select which conversion they want to perform.
4. Create a selection structure to accommodate 6 items.
5. In each item ask for the necessary input using the input function in #1 above, then perform the conversion and print out the result.