In C++

only need code for number 4

3. isPrime Function A prime number is a number that is only evenly divisible by itself and 1 . For example, the number 5 is prime because it can only be evenly divided by 1 and 5 . The number 6 , however, is not prime because it can be divided evenly by 1,2,3, and 6 . Write a function name isPrime, which takes an integer as an argument and returns true if the argument is a prime number, or false otherwise. Demonstrate the function in a complete program. TIP: Recall that the % operator divides one number by another, and returns the remainder of the division. In an expression such as num 1% num2 , the % operator will return 0 if num 1 is evenly divisible by num 2 . 4. Prime Number List Use the isPrime function that you wrote in the previous problem in a program that stores a list of all the prime numbers from 1 through 100 in the file "primers.txt