Qt 5.0.2 how to set kit and compiler

hi guys… i am looking for a way or tutorial to set the compiler and kit in Qt 5.0.2 to start compile and run the app… after installing Qt 5.0.2 , as i wish to build or run an app , it says …. “Qt Creator needs a compiler setup to build.Configure a compiler in the kit options…” i want to compile a project for win 7 (pc platform) -64 bit and also for Android platform… how can i set kit and compiler settings in Menu->Tools->Options->Build And Run… please help …