Business Boardroom

You have been working hard in the business office on a presentation. Looking around you realise you are the last person in the office and have to lock up. The realisation that you have been locked in starts to dawn on you, with the only way out of the room being a coded door. The building locks down at 6 pm, it is currently 5:30 pm. Can you solve the puzzles and find the code to the door within the 30 minute timer or will you be sleeping in the boardroom tonight!