You will allocate and free memory in a simple program where you can add or drop students from a class. We supply code for a simple student class with data members name and GPA. In main we declare a vector of pointers to the student class. You will fill in two sections of code.1) You will define a student member function called ToString which returns a string containing basic student information. For a student named Jane with a GPA of 3.76 the string returned would be:You will create the string using an ostringstream from sstream. Note that you need to setprecision to 1 for that stream.2) You will write the main function as specified below.