Programming languages: syntax and semantics, with design and implementation and with paradigms

1. 
   

   Since a semantics of a programming language maps its syntax to its model of computation, is implementating a programming language mostly (if not all) about its semantics?

   
   


2. 
   

   Is designing a programming language mostly (if not all) about designing the syntax of a programming language?

   
   


3. 
   

   Is designing a programming language mostly (if not all) about designing how to write programs in the language?

   
   


4. 
   

   Do imperative, functional and logical programming paradigms belong to semantics or syntax of programming languages?