Home security system | Computer Science homework help

Message: Using Multisim 11, please help me build a home security system circuit using this program. The system must include a door sensor and a window sensor. There also must be a keypad included into the schematic. A code (for example, 5411) must first be entered into the key pad in order to be able to arm the sensors throughout the home (and disarm as well). Once the command is made to arm the sensors, there will be a period of 15 seconds until the sensors are active. Please .ms11 (multisim 11) files ONLY! Thanks!