Data: we wish to allow our string class to accommodate strings of different sizes. to that end, instead of storing a string’s characters in a fixed-size array, each string object should contain the following data as part of its internal representation: (1) a character pointer meant to point to a dynamically-allocated array of characters. (2) a length field that will hold the current length of the string at any given moment. operations: same as the methods in string class, plus the "big three"( destructor, copy constructor, and assignment operator overloading). modularity: the string class code must be put in its own module, i. e., a file mystring2.h (the header file) should hold the class definition (use conditional compilation directives) and a file mystring2.cpp (the implementation file) should hold the method definitions.