1. (2 pts) Which library function in copies one string into a destination array ________________________? 2. (2 pts) Which library function in appends one string to the end of another ________________________? 3. (2 pts) Which library function in compares two strings ________________________? 4. (9 pts) Write a function called my_strlen() that counts the number of characters in a string, not including the null character. The function my_strlen() accepts the string as an argument and returns the length of that string.