There are 12 prize packs that are available. How may combinations can be created with 4 notepads, 7 pencils, 6 pens, 4 food court vouchers, 5 lanyards?

The answer is a because i went through all the other ones that it didn’t come out right

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's