c++ please answer as soon as possible and provide clear and precise coding, thank you

3. Write the definition of the bool function Contained whose header is template bool Contained (const Array& ari,const Array& ar2) I It returns true if all of the values in ur2 is in ard; otherwise, it returns false. If both art and ar2 are empty, the function returns true. 4. Given the class Date whose private fields are int year: int day: string month; write the special member functions of Date such that its default values are "January", 1, 1900 for month, day and yet respectively