I have an array of 100 elements, each of which is a random integer. I want to know which of the elements: a) are multiples of 2 b) are multiples of 2 AND 5 c) have a remainder of 3 when divided by 7

I have an array of 100 elements. Each element contains some text. i want to: append a star character to the end of every fifth element remove every second character from every tenth element, and… add a line feed (ascii 10) after the 30th character of every array element whose length is greater than 30 characters.