Given the first term and the common difference of an arithmetic sequence find the recursive formula and the next 3terms! Guys I really need help! So please don’t respond and tell me to search it up on the internet! I really need help and an explanation!

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

Ithink it’s b because it say 3 plastic rings and all the balls