Clear and short answer

Problem 1 (20% total) Use no more than one sentence to answer each of the following questions. (a) (3%) Attribute grammars are extensions to context-free grammars, what are the extensions? (b) (3%) How is the value of a synthesized attribute on a parse tree node computed? (c) (3%) How is the value of an intrinsic attribute on a parse tree node determined? (d) (3%) What is the main purpose of a predicate function, if any, in an attribute grammar? (e) (3%) List the four phases of the compilation process in order. (f) (5%) Linked lists are used to serve as the internal representation of LISP lists. Draw a linked list for the LISP list: ((A B) C (D E)