Research and planning-answers for trailer questions

After carrying out these audience interviews I learnt that:

• people want an element of surprise and suspense in a thriller trailer
• also they would like a trailer that keeps you guessing and doesn't give away too much of the plot.
• the trailer should be 1-2 mins long
• people expect a 15 certificate for a thriller film
• the poster would consist of a colour scheme involving red and black as these are popular with audiences 
• the trailer should have realism as oppose to supernatural elements
• the trailer should be similar to popular thriller films such as Taken