advanced spreadsheet discussion

Choose only one from the following and explain in detail; do not just list the steps to create unless stated: 150 word count

Session 8.3

• Explore the principles of a product mix
• Run Solver to calculate optimal solutions
• Create and apply constraints to a Solver model
• Save and load a Solver model

You may also answer one of the following questions with a 150-word count to reply to my post and meet the requirement:

1. What is an add-in?