You are working as the software tester for a large school and need to test the exam calculator for students. Your school does not want students to use a physical calculator. The software development team has released a calculator application. You need to ensure that everything is working as expected.
Address the following:

Download the calculator executable file and source code file.
Write the functional test cases for the Calculator application. Here is the sample test case document.
You need to create the Excel file with the following columns:

Test Case ID
Test Case Name
Test Case Scenario
Detailed Test Steps
Test Data
Expected Results
Actual Results After Test Case Execution

Create at least 20 test cases in a single Excel file.
Execute each of the test cases, and update the actual results in the After Test Case Execution column.
Provide an explanation as to whether the school should release this calculator to students.