Problem 3. (20 points) Consider the interface for the Mvector class. Add an operator A (both Mvector. For example, suppose v is clared Mvector int> . Then after v is populated with data, the operator could be applied prefix and postix) that when applied to an Mvector, sorts the 2 template typename T> class Mvector public: Mvector); Mvector (unsigned int n); void pushback (T x); void popback) void clear ); void insert (int i, T x); void erase(int i); T operator [1 (unsigned int i); int size); private int vsize; int vcap; T *v void reserve(unsigned int n); (a) Give the operator prototypes which should be added to the interface. (b) Give the function for the prefix operator. You do not have to write both functions.) Problem 3. (20 points) Consider the interface for the Mvector class. Add an operator A (both Mvector. For example, suppose v is clared Mvector int> . Then after v is populated with data, the operator could be applied prefix and postix) that when applied to an Mvector, sorts the 2 template typename T> class Mvector public: Mvector); Mvector (unsigned int n); void pushback (T x); void popback) void clear ); void insert (int i, T x); void erase(int i); T operator [1 (unsigned int i); int size); private int vsize; int vcap; T *v void reserve(unsigned int n); (a) Give the operator prototypes which should be added to the interface. (b) Give the function for the prefix operator. You do not have to write both functions.)