1. WHAT ARE THE MAIN REQUIREMENTS FOR A VALID CONTRACT;

2. WHAT IS THE DIFFERENCE BETWEEN AN OFFER AND AN INVITATION TO TREAT AND WHY IS THE DIFFERENCE IMPORTANT;

Do not type in all-caps.

Also, please understand that no one here will do your work for you. However, we will be happy to read over whatever you come up with and make suggestions and/or corrections.

Please post what you think.