3. Write a program that asks the user for their first name and last name. Ask the user for their student ID. You must use your own name and student ID. Output your initials and your ID with no spaces between your initials and ID number. Count the number of initials and ID numbers Output should be initials and numbers concatenated - example: rl000000 length

Write a method named addall that could be placed inside the hashintset class. this method accepts another hashintset as a parameter and adds all elements from that set into the current set, if they are not already present. for example, if a set s1 contains [1, 2, 3] and another set s2 contains [1, 7, 3, 9], the call of s1.addall(s2); would change s1 to store [1, 2, 3, 7, 9] in some order. you are allowed to call methods on your set and/or the other set. do not modify the set passed in. this method should run in o(n) time where n is the number of elements in the parameter set passed in.