Product detail page

Hello,
I am very interested in the Hikashop extension for my Joomla template and I have some questions;
In the product detail page:
1- I need to add the product size and color as options for the customer,
i. are they (size and color) considered as product options or product variants (so they are supported with the Free Hikashop version)?
2- Can we add some icons to share the product on social media?
i. In the Features list www.hikashop.com/extensions.html all the Hikashop versions have the “Social networks support (Twitter and FaceBook)”, this feature allow me to share the product or it is a link to the facebook comments page...?
3- Is there any limitation on the big/main picture dimensions?
i. Can I put a large picture with the full width of the page?
4- Can we add the options to write reviews and then we can manage the reviews added from site visitors and maybe respond?
i. The “vote and comment” feature is present in the demo page demo.hikashop.com/index.php/en/hikashop/product-page , is it for all Hikashop versions?

Thank you in advance,

Thank you for your assistance,