Markus
Ansys Employee

Hello Jason Sum,

let me try to answer c). optiSLang is since 24R2 part of the Student Package: Download Ansys Student | Workbench-based Simulation Tools

 An overview about differences of optiSLang and DesignXplorer is given here: Optislang and designXplorer (ansys.com)

 I hope this helps you. 

Best regards,

Markus