C++ please

1. Write a program that displays a histogram based on a number entered by the user. For example:

Enter a number: 5

5: *****

Enter a number: 2

2: **

Write the program once with a while loop and again with a for loop.

2. Write a program that computes the factorial of a number. For example, 5! = 5 * 4 * 3 * 2 * 1 = 120. Turn the program into a function and use the function in a program.

Write the program once with a while loop and again with a for loop.

3. Write a program that validates input for a program. For this program, the input should be between 1 and 10. If the user enters a value less than 1 or greater than 10, the user should be asked to enter the value again until it is within the range.

Use a while loop for this program.

4. Turn problem 1 into a void function and use the function in a program. The function should accept the number to display as an argument:

histo(3) displays:

3: ***

Use a for loop for this program.

5. Write a program that sums a set of numbers entered by the user until the user enters -666, at which point the program displays the sum.

Use a while loop for this program. Could you write it with a for loop? Try it to see.