Consider the following class declaration. Class Customer fails to effectively encapsulate a data member, thereby risking a run-time error due to corrupted data. Using C++, locate the problem(s) and to complete the class to keep track of total year-to-date purchases. If an item to be purchased costs more than the customer’s credit limit, do not allow the sale. Declare and define data fields, accessors, and mutators which will keep track of the total number of sales and total sales for each instance of Customer. Use the filename customer. h, customer. cpp and customerDemo. cpp for your programs. class Customer{public:Customer(string name, string address, string city, string state, string zipcode);void increase_limit(double amount);string get_name() const;string get_address() const;string get_city() const;string get_state() const;double credit_limit;private:string name;string address;string city;string state;string zipcode;}