Install Process - Error that msql and gd extensions are not load.

Hi eveyrone,

I need some assistance of where or what I must do to fix the error I am receiving on the environment checks?

Step 2: Environment checks
OK: PHP version is 5.3.3
Error: 'mysql' extension is not loaded
Error: 'gd' extension is not loaded
OK: 'simplexml' extension is loaded
OK: /config/config.php is writable
OK: /public/files is writable
OK: /cache is writable
OK: /upload is writable

I do have mysql installed on the system with a user name and pass to access it.

Thank you for your help...