I would like to apply a free shipping coupon to a specific user,say :test@email.com.while checkout in woocommerce

I have a size of 324*243 which rendered in product archive and shop page.In bigger screens the images appeared as blurred.How can i fix that?

Can I create a custom url to clear cart item by simply running the url? Is this feature availble by default in woocommerce?

In WooCommerce, how can I get all orders of a single customer with a user id? Also I want to get order number of each orders of that particular user.