Using using only while loop in C++

1.print all positive numbers from list {3, 2, -7, 19, 20 }p .

2. Print the sum of negative nummber of the list form 5 to 20;

3. Print the nums between -7 and 20 of list;

4. Print count how many -7 in the list .

5. Print if -7 exist in the list .

6. Do all programs seperately step by step solution and explanation is appriciat