Correct syntax to use where clause is WHERE city = :city AND state = :state

Query parameters are a defined set of parameters attached to the end of a url. They are extensions of the URL that are used to help define specific content or actions based on the data being passed. To append query params to the end of a URL, a '?' Is added followed immediately by a query parameter.
To add multiple parameters, an '&' is added in between each.
Hence coming back to question, endpoint would return Patients with name as John and (and is very important here) surname as Bell

API Exchange creates REST conenctor automtaically once API is published. Hence correct answer is Publish the API specification to Any point Exchange