Exercise#3: Write a program that reads a string from the user with the length of 5. The Program should print the String to the console but in reverse order. For example, if the String read is "Hello" from the user then your program will print olleH. (Hint: use charAt( method). Exercise#4: Read a name from the user ( assume the user enters first and last names and are separated by a space) then create a new string and combine: last name first followed by a comma and a space, followed by the first name and then print the new string. For example, if the input is "Ali Alhammadi", the output is "Alhammadi, Ali". Exercise#3: Write a program that reads a string from the user with the length of 5. The Program should print the String to the console but in reverse order. For example, if the String read is "Hello" from the user then your program will print olleH. (Hint: use charAt() method). Exerciset4: Read a name from the user ( assume the user enters first and last names and are separated by a space) then create a new string and combine: last name first followed by a comma and a space, followed by the first name and then print the new string. For example, if the input is "Ali Alhammadi", the output is "Alhammadi, Ali