Consider the following two classes:

class first

{

public:

void print() const;

//Outputs the values of x and y

protected:

void setData(int u, int v);

//Postcondition: x = u; y = v;

private:

int x;

int y;

};

class second: public first

{

public:

void setData(int a, int b, int c);

//Postcondition: x = a; y = b; z = c;

void print() const;

//Outputs the values of x, y, and z

private:

int z;

};

a)Write the definition of the function setData of the class second.

b)What does the word protected in class first mean?