Dehydrobromination of 3-bromo-3-cyclopentylhexane and number of possible alkene products

I faced a question like this:



> 
> The total number of alkene products possible from the dehydrobromination of 3-bromo-3-cyclopentylhexane is:
> 
> 
> 


The answer is given 5. But I only found 3.


1. 3-cyclopentylhex-2-ene
2. 3-cyclopentylhex-3-ene
3. (hexan-3-ylidene)cyclopentane


I can't find the other 2. Any hint?




![solution re](https://i.stack.imgur.com/LbV3Y.jpg)


The structures (i) and (ii) have two isomers each,namely E and Z isomers.


For the structure (iii) there is a plane of symmetry (marked in the diagram) so it is not a geometrical isomer.


Thus Number of isomers=2 (of structure i) +2 (of structure ii) + 1(of structure iii)= 5 isomers


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