Symbian Simple Application Development

Hi, I need to develop the following Symbian Application which should run on s60v3:- When a user calls the phone, it should be activated on its own, and say a pre-recorded message ("asking the user to enter a pin"). Once that is done, the user must enter the pin. It must then repeat the pin and the user must say whether the entered pin is correct or not. If not then the whole process should be repeated. If yes then continue. It should verify the pin on the basis of the algorithm i give. Once verified, it should ring on the phone and the app should go silent and allow the caller to talk to the person. Once the call is over, it should send an SMS to a predefined number with the entered pin of the user and the duration of the call and the phone number. Every once in a while, it will receive a list by SMS of invalid pins and it must invalidate those pins. (i.e. add an exeception in the algorithm and deny those pins) Thats all that is required.