Grade Calculator: Please enter your three test scores to compute the average score & final grade. Note: Scores Must Be From 0 to 100! Enter Test 1 Score: Enter Test 2 Score: Enter Test 3 Score: Assignment Objectives: Learn about conditionals Learn how to use a switch statement Learn about loops Understand blocks and nested statements The purpose of this assignment is to use PHP to calculate a student grade. If else statements are used to report the appropriate grade and message back to the user. PHP also provides a message if the grade entry is invalid.