Problem: Yolanda is now ready to have us work with formulas and functions to summarize expense data. She needs to know that you understand the difference between a complex formula and a function.
1. How to add four cells together using a cell reference and the + operator.
2. How to add four cells together without using the + operator.
3. List the three methods we can use to create a function from chapter two and describe which method you feel the most comfortable using, and why.