I need help with A few C++ questions that are listed below.the first one is a simple code question and the others are yes/no questions. Thank you

1. Write a simple program which prompts the user for a positive integer n and outputs the sum of the first n positive integers. This particular problem can be solved with an expression, with iteration, and with recursion. Implement each solution. For those who cant remember, the sum of the first n positive integers is n* (n+1) / 2. (please include the solutions using the three ways listed above).

2. Consider the following two class implementations. Is the integer array part of the member data?

class exa

{

private:

int value;

public: exa();

exa(int v);

int getValue() { return value;}

int setValue(int v) { value = v;} }

exa::exa() {

value = 0;

int *arr = nullptr; }

exa::exa(int v)

{ value = v;

int *arr = new int[value]; }

3. Consider the following two class implementations. Is the integer array part of the member data?

class exa

{

private:

int value;

int *arr;

public:

exa();

exa(int v);

int getValue() { return value;}

int setValue(int v) { value = v;}

} exa::exa()

{

value = 0;

int *arr = nullptr;

}

exa::exa(int v)

{

value = v;

int *arr = new int[value];

}

4. Consider the following two class implementations. Is the integer array part of the member data?

class exa

{

private:

int value;

int *arr;

public:

exa();

exa(int v);

int getValue() { return value;}

int setValue(int v) { value = v;}

}

exa::exa()

{

value = 0;

*arr = nullptr;

}

exa::exa(int v)

{

value = v;

*arr = new int[value];

}