The static semantics phase of the project requires considerably more effort than the previous phase.Extend your compiler to find, report, and recover from semantic errors in Decaf programs. Most semantic errors can be checked by testing the rules enumerated in the section “Semantic Rules”. This part of the project includes the following tasks: a) Add semantic actions to your CUP parser specification to construct a high-level intermediate representation (IR) tree, and to perform any semantic checks you choose to do as part of the parsing process, b) Build symbol tables for the classes, c) Perform all remaining semantic checks by traversing the IR and accessing the symbol tables.