source Q4: Consider the expression a=b+c+2, in a program, where, a,b,c are identifiers and 5+,* are operators. Perform the compilation steps manually as directed below: lexical analysis: create token & validate tokens (give explanation). Syntax analysis: create the Grammar rules & parse tree. Semantic analysis: check semantics using symbol table info. (.e. identifiers & operators.) Intermediate code generation: Create an equivalent intermediate representation. Code optimization: Optimize the intermediate code. Code generation: Generate machine executable code (Assembly Codes)