The following javascript program is supposed to print: 1 by 4 by 9
on a single line by itself. unfortunately the program contains at least eight mistakes. write the corrected line beside the line in error.
var n; // text
n : = 1;
document. writeln( n );
document. writeln( “ by “);
document. writeln( “n + 3”);
document. writeln( “ by “ );
document. writeln( n + 5);

1)consider the following code snippet: #ifndef book_h#define book_hconst double max_cost = 1000.0; class book{public: book(); book(double new_cost); void set_cost(double new_cost); double get_cost() const; private: double cost; }; double calculate_terms(book bk); #endifwhich of the following is correct? a)the header file is correct as given.b)the definition of max_cost should be removed since header files should not contain constants.c)the definition of book should be removed since header files should not contain class definitions.d)the body of the calculate_terms function should be added to the header file.