This one isn’t really that hard. the answer is 24.
Answer:
208.........not sure but this can be the ans
we have been asked to find the sum of the series

As we know that a geometric series has a constant ratio "r" and it is defined as

The first term of the series is 
Geometric series sum formula is

Plugin the values we get

On simplification we get

Hence the sum of the given series is
I would say A hope I helped
20 weeks long all you have to do is to 180\9