Hello i bought a irulu it came with a usb keyboard .the problem i have is that like when i press letters like m i get a , and when i press a i get a q the w a z b does nothing much nothing i bought another usb keyboard but it does the samething.. also tried my sons and so i thought the problem was the tablet so i returned it and got a replacement still has the same issue ..can anyone me resolve this issue you

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.