This HW is important and the midterm is depending on it , since the racket language is not popular there is no good amount of explanation on the internet.

can you solve and explain the main idea of this question.

Functions with Multiple Start with the FWAE interpreter, and extend the implementation to support any number of arguments to a function (including zero), and any number of arguments (including zero) in a function application Arguments ::- I s were the same. To prevent this problem, your parse function should detect this problem and reports a "bad syntax" error. For example, (parse 'tfun ff x x} x]) should report a "bad syntax" error, while (parse fun f x y x) should produce a fun value Remember that the PLAI language provides the useful function map: map takes a function and a list, and applies the function to each element in the list, returning a list of results. For example, if sexps is a list of S-expressions to parse, (map parse sexps) produces a list of FWAEs by parsing each S-expression You can decide whether to use deferred substitution Functions with Multiple Start with the FWAE interpreter, and extend the implementation to support any number of arguments to a function (including zero), and any number of arguments (including zero) in a function application Arguments ::- I s were the same. To prevent this problem, your parse function should detect this problem and reports a "bad syntax" error. For example, (parse 'tfun ff x x} x]) should report a "bad syntax" error, while (parse fun f x y x) should produce a fun value Remember that the PLAI language provides the useful function map: map takes a function and a list, and applies the function to each element in the list, returning a list of results. For example, if sexps is a list of S-expressions to parse, (map parse sexps) produces a list of FWAEs by parsing each S-expression You can decide whether to use deferred substitution